mirror of
https://github.com/nillerusr/source-engine.git
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706 lines
19 KiB
C++
706 lines
19 KiB
C++
//===== Copyright 1996-2005, Valve Corporation, All rights reserved. ======//
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//
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// Purpose:
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//
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//===========================================================================//
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#if defined( _WIN32 ) && !defined( _X360 )
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#include <windows.h>
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#endif
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#if !defined( DONT_PROTECT_FILEIO_FUNCTIONS )
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#define DONT_PROTECT_FILEIO_FUNCTIONS // for protected_things.h
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#endif
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#if defined( PROTECTED_THINGS_ENABLE )
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#undef PROTECTED_THINGS_ENABLE // from protected_things.h
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#endif
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#include <stdio.h>
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#include "tier1/interface.h"
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#include "basetypes.h"
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#include "tier0/dbg.h"
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#include <string.h>
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#include <stdlib.h>
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#include "tier1/strtools.h"
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#include "tier0/icommandline.h"
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#include "tier0/dbg.h"
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#include "tier0/stacktools.h"
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#include "tier0/threadtools.h"
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#ifdef _WIN32
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#include <direct.h> // getcwd
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#endif
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#if defined( _X360 )
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#include "xbox/xbox_win32stubs.h"
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#endif
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#ifdef _PS3
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#include "sys/prx.h"
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#include "tier1/utlvector.h"
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#include "ps3/ps3_platform.h"
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#include "ps3/ps3_win32stubs.h"
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#include "ps3/ps3_helpers.h"
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#include "ps3_pathinfo.h"
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#elif defined(POSIX)
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#include "tier0/platform.h"
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#endif // _PS3
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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// ------------------------------------------------------------------------------------ //
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// InterfaceReg.
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// ------------------------------------------------------------------------------------ //
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#ifdef POSIX
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DLL_GLOBAL_EXPORT
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#endif
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InterfaceReg *s_pInterfaceRegs;
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InterfaceReg::InterfaceReg( InstantiateInterfaceFn fn, const char *pName ) :
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m_pName(pName)
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{
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m_CreateFn = fn;
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m_pNext = s_pInterfaceRegs;
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s_pInterfaceRegs = this;
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}
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// ------------------------------------------------------------------------------------ //
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// CreateInterface.
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// This is the primary exported function by a dll, referenced by name via dynamic binding
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// that exposes an opqaue function pointer to the interface.
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//
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// We have the Internal variant so Sys_GetFactoryThis() returns the correct internal
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// symbol under GCC/Linux/Mac as CreateInterface is DLL_EXPORT so its global so the loaders
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// on those OS's pick exactly 1 of the CreateInterface symbols to be the one that is process wide and
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// all Sys_GetFactoryThis() calls find that one, which doesn't work. Using the internal walkthrough here
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// makes sure Sys_GetFactoryThis() has the dll specific symbol and GetProcAddress() returns the module specific
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// function for CreateInterface again getting the dll specific symbol we need.
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// ------------------------------------------------------------------------------------ //
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void* CreateInterfaceInternal( const char *pName, int *pReturnCode )
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{
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InterfaceReg *pCur;
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for (pCur=s_pInterfaceRegs; pCur; pCur=pCur->m_pNext)
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{
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if (strcmp(pCur->m_pName, pName) == 0)
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{
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if (pReturnCode)
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{
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*pReturnCode = IFACE_OK;
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}
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return pCur->m_CreateFn();
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}
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}
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if (pReturnCode)
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{
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*pReturnCode = IFACE_FAILED;
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}
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return NULL;
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}
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void* CreateInterface( const char *pName, int *pReturnCode )
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{
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return CreateInterfaceInternal( pName, pReturnCode );
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}
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#if defined( POSIX ) && !defined( _PS3 )
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// Linux doesn't have this function so this emulates its functionality
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void *GetModuleHandle(const char *name)
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{
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void *handle;
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if( name == NULL )
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{
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// hmm, how can this be handled under linux....
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// is it even needed?
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return NULL;
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}
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if( (handle=dlopen(name, RTLD_NOW))==NULL)
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{
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printf("DLOPEN Error:%s\n",dlerror());
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// couldn't open this file
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return NULL;
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}
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// read "man dlopen" for details
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// in short dlopen() inc a ref count
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// so dec the ref count by performing the close
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dlclose(handle);
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return handle;
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}
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#endif
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#if defined( _WIN32 ) && !defined( _X360 )
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#define WIN32_LEAN_AND_MEAN
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#include "windows.h"
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#endif
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//-----------------------------------------------------------------------------
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// Purpose: returns a pointer to a function, given a module
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// Input : pModuleName - module name
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// *pName - proc name
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//-----------------------------------------------------------------------------
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static void *Sys_GetProcAddress( const char *pModuleName, const char *pName )
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{
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#if defined( _PS3 )
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Assert( !"Unsupported, use HMODULE" );
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return NULL;
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#else // !_PS3
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HMODULE hModule = (HMODULE)GetModuleHandle( pModuleName );
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#if defined( WIN32 )
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return (void *)GetProcAddress( hModule, pName );
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#else // !WIN32
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return (void *)dlsym( (void *)hModule, pName );
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#endif // WIN32
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#endif // _PS3
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}
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static void *Sys_GetProcAddress( HMODULE hModule, const char *pName )
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{
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#if defined( WIN32 )
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return (void *)GetProcAddress( hModule, pName );
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#elif defined( _PS3 )
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PS3_LoadAppSystemInterface_Parameters_t *pPRX = reinterpret_cast< PS3_LoadAppSystemInterface_Parameters_t * >( hModule );
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if ( !pPRX )
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return NULL;
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if ( !strcmp( pName, CREATEINTERFACE_PROCNAME ) )
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return reinterpret_cast< void * >( pPRX->pfnCreateInterface );
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Assert( !"Unknown PRX function requested!" );
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return NULL;
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#else
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return (void *)dlsym( (void *)hModule, pName );
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#endif
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}
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bool Sys_IsDebuggerPresent()
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{
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return Plat_IsInDebugSession();
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}
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struct ThreadedLoadLibaryContext_t
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{
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const char *m_pLibraryName;
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HMODULE m_hLibrary;
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DWORD m_nError;
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ThreadedLoadLibaryContext_t() : m_pLibraryName(NULL), m_hLibrary(0), m_nError(0) {}
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};
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#ifdef _WIN32
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// wraps LoadLibraryEx() since 360 doesn't support that
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static HMODULE InternalLoadLibrary( const char *pName )
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{
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#if defined(_X360)
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return LoadLibrary( pName );
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#else
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return LoadLibraryEx( pName, NULL, LOAD_WITH_ALTERED_SEARCH_PATH );
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#endif
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}
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unsigned ThreadedLoadLibraryFunc( void *pParam )
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{
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ThreadedLoadLibaryContext_t *pContext = (ThreadedLoadLibaryContext_t*)pParam;
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pContext->m_hLibrary = InternalLoadLibrary(pContext->m_pLibraryName);
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return 0;
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}
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#endif
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// global to propagate a library load error from thread into Sys_LoadModule
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static DWORD g_nLoadLibraryError = 0;
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static HMODULE Sys_LoadLibraryGuts( const char *pLibraryName )
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{
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#ifdef PLATFORM_PS3
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PS3_LoadAppSystemInterface_Parameters_t *pPRX = new PS3_LoadAppSystemInterface_Parameters_t;
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V_memset( pPRX, 0, sizeof( PS3_LoadAppSystemInterface_Parameters_t ) );
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pPRX->cbSize = sizeof( PS3_LoadAppSystemInterface_Parameters_t );
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int iResult = PS3_PrxLoad( pLibraryName, pPRX );
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if ( iResult < CELL_OK )
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{
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delete pPRX;
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return NULL;
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}
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return reinterpret_cast< HMODULE >( pPRX );
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#else
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char str[1024];
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// How to get a string out of a #define on the command line.
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const char *pModuleExtension = DLL_EXT_STRING;
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const char *pModuleAddition = pModuleExtension;
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V_strncpy( str, pLibraryName, sizeof(str) );
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if ( !V_stristr( str, pModuleExtension ) )
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{
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if ( IsX360() )
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{
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V_StripExtension( str, str, sizeof(str) );
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}
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V_strncat( str, pModuleAddition, sizeof(str) );
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}
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V_FixSlashes( str );
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#ifdef _WIN32
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ThreadedLoadLibraryFunc_t threadFunc = GetThreadedLoadLibraryFunc();
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if ( !threadFunc )
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{
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HMODULE retVal = InternalLoadLibrary( str );
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if( retVal )
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{
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StackToolsNotify_LoadedLibrary( str );
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}
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#if 0 // you can enable this block to help track down why a module isn't loading:
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else
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{
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#ifdef _WINDOWS
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char buf[1024];
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FormatMessage(
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL,
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GetLastError(),
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0, // Default language
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(LPTSTR) buf,
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1023,
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NULL // no insert arguments
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);
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Warning( "Could not load %s: %s\n", str, buf );
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#endif
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}
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#endif
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return retVal;
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}
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ThreadedLoadLibaryContext_t context;
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context.m_pLibraryName = str;
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context.m_hLibrary = 0;
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ThreadHandle_t h = CreateSimpleThread( ThreadedLoadLibraryFunc, &context );
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#ifdef _X360
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ThreadSetAffinity( h, XBOX_PROCESSOR_3 );
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#endif
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unsigned int nTimeout = 0;
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while( WaitForSingleObject( (HANDLE)h, nTimeout ) == WAIT_TIMEOUT )
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{
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nTimeout = threadFunc();
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}
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ReleaseThreadHandle( h );
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if( context.m_hLibrary )
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{
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g_nLoadLibraryError = 0;
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StackToolsNotify_LoadedLibrary( str );
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}
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else
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{
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g_nLoadLibraryError = context.m_nError;
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}
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return context.m_hLibrary;
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#elif defined( POSIX ) && !defined( _PS3 )
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HMODULE ret = (HMODULE)dlopen( str, RTLD_NOW );
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if ( ! ret )
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{
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const char *pError = dlerror();
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if ( pError && ( strstr( pError, "No such file" ) == 0 ) && ( strstr( pError, "image not found") == 0 ) )
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{
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Msg( " failed to dlopen %s error=%s\n", str, pError );
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}
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}
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// if( ret )
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// StackToolsNotify_LoadedLibrary( str );
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return ret;
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#endif
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#endif
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}
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static HMODULE Sys_LoadLibrary( const char *pLibraryName )
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{
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// load a library. If a library suffix is set, look for the library first with that name
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char *pSuffix = NULL;
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if ( CommandLine()->FindParm( "-xlsp" ) )
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{
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pSuffix = "_xlsp";
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}
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#ifdef POSIX
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else if ( CommandLine()->FindParm( "-valveinternal" ) )
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{
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pSuffix = "_valveinternal";
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}
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#endif
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#ifdef IS_WINDOWS_PC
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else if ( CommandLine()->FindParm( "-ds" ) ) // windows DS bins
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{
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pSuffix = "_ds";
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}
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#endif
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if ( pSuffix )
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{
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char nameBuf[MAX_PATH];
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strcpy( nameBuf, pLibraryName );
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char *pDot = strchr( nameBuf, '.' );
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if ( pDot )
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*pDot = 0;
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V_strncat( nameBuf, pSuffix, sizeof( nameBuf ), COPY_ALL_CHARACTERS );
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HMODULE hRet = Sys_LoadLibraryGuts( nameBuf );
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if ( hRet )
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return hRet;
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}
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return Sys_LoadLibraryGuts( pLibraryName );
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}
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//-----------------------------------------------------------------------------
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// Purpose: Keeps a flag if the current dll/exe loaded any debug modules
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// This flag can also get set if the current process discovers any other debug
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// modules loaded by other dlls
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//-----------------------------------------------------------------------------
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static bool s_bRunningWithDebugModules = false;
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#ifdef IS_WINDOWS_PC
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//-----------------------------------------------------------------------------
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// Purpose: Construct a process-specific name for kernel object to track
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// if any debug modules were loaded
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//-----------------------------------------------------------------------------
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static void DebugKernelMemoryObjectName( char *pszNameBuffer )
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{
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sprintf( pszNameBuffer, "VALVE-MODULE-DEBUG-%08X", GetCurrentProcessId() );
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}
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#endif
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//-----------------------------------------------------------------------------
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// Purpose: Loads a DLL/component from disk and returns a handle to it
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// Input : *pModuleName - filename of the component
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// Output : opaque handle to the module (hides system dependency)
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//-----------------------------------------------------------------------------
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CSysModule *Sys_LoadModule( const char *pModuleName )
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{
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// If using the Steam filesystem, either the DLL must be a minimum footprint
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// file in the depot (MFP) or a filesystem GetLocalCopy() call must be made
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// prior to the call to this routine.
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HMODULE hDLL = NULL;
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char alteredFilename[ MAX_PATH ];
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if ( IsPS3() )
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{
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// PS3's load module *must* be fed extensions. If the extension is missing, add it.
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if (!( strstr(pModuleName, ".sprx") || strstr(pModuleName, ".prx") ))
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{
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strncpy( alteredFilename, pModuleName, MAX_PATH );
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strncat( alteredFilename, DLL_EXT_STRING, MAX_PATH );
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pModuleName = alteredFilename;
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}
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}
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else
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{
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alteredFilename; // just to quash the warning
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}
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if ( !V_IsAbsolutePath( pModuleName ) )
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{
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// full path wasn't passed in, using the current working dir
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char szAbsoluteModuleName[1024];
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#if defined( _PS3 )
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// getcwd not supported on ps3; use PRX PATCH path if patched
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if ( g_pPS3PathInfo->IsPatched() )
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{
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V_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/bin/%s",
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g_pPS3PathInfo->GamePatchBasePath(), pModuleName );
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hDLL = Sys_LoadLibrary( szAbsoluteModuleName );
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}
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if ( !hDLL ) // use base PRX path
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{
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V_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/%s",
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g_pPS3PathInfo->PrxPath(), pModuleName );
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hDLL = Sys_LoadLibrary( szAbsoluteModuleName );
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}
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#else // !_PS3
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char szCwd[1024];
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_getcwd( szCwd, sizeof( szCwd ) );
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if ( IsX360() )
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{
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int i = CommandLine()->FindParm( "-basedir" );
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if ( i )
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{
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strcpy( szCwd, CommandLine()->GetParm( i+1 ) );
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}
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}
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if (szCwd[strlen(szCwd) - 1] == '/' || szCwd[strlen(szCwd) - 1] == '\\' )
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{
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szCwd[strlen(szCwd) - 1] = 0;
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}
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size_t cCwd = strlen( szCwd );
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if ( strstr( pModuleName, "bin/") == pModuleName || ( szCwd[ cCwd - 1 ] == 'n' && szCwd[ cCwd - 2 ] == 'i' && szCwd[ cCwd - 3 ] == 'b' ) )
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{
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// don't make bin/bin path
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V_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/%s", szCwd, pModuleName );
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}
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else
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{
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V_snprintf( szAbsoluteModuleName, sizeof(szAbsoluteModuleName), "%s/bin/%s", szCwd, pModuleName );
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}
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hDLL = Sys_LoadLibrary( szAbsoluteModuleName );
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#endif // _PS3
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}
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if ( !hDLL )
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{
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// full path failed, let LoadLibrary() try to search the PATH now
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hDLL = Sys_LoadLibrary( pModuleName );
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#if defined( _DEBUG )
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if ( !hDLL )
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{
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// So you can see what the error is in the debugger...
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#if defined( _WIN32 ) && !defined( _X360 )
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char *lpMsgBuf;
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FormatMessage(
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FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL,
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GetLastError(),
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
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(LPTSTR) &lpMsgBuf,
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0,
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NULL
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);
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LocalFree( (HLOCAL)lpMsgBuf );
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#elif defined( _X360 )
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DWORD error = g_nLoadLibraryError ? g_nLoadLibraryError : GetLastError();
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Msg( "Error(%d) - Failed to load %s:\n", error, pModuleName );
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#elif defined( _PS3 )
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Msg( "Failed to load %s:\n", pModuleName );
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#else
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Msg( "Failed to load %s: %s\n", pModuleName, dlerror() );
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#endif // _WIN32
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}
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#endif // DEBUG
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}
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// If running in the debugger, assume debug binaries are okay, otherwise they must run with -allowdebug
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if ( !IsGameConsole() && Sys_GetProcAddress( hDLL, "BuiltDebug" ) )
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{
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if ( hDLL && !CommandLine()->FindParm( "-allowdebug" ) &&
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!Sys_IsDebuggerPresent() )
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{
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Error( "Module %s is a debug build\n", pModuleName );
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}
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DevWarning( "Module %s is a debug build\n", pModuleName );
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if ( !s_bRunningWithDebugModules )
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{
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s_bRunningWithDebugModules = true;
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#ifdef IS_WINDOWS_PC
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char chMemoryName[ MAX_PATH ];
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DebugKernelMemoryObjectName( chMemoryName );
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(void) CreateFileMapping( INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, 1024, chMemoryName );
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// Created a shared memory kernel object specific to process id
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// Existence of this object indicates that we have debug modules loaded
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#endif
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}
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}
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return reinterpret_cast<CSysModule *>(hDLL);
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}
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//-----------------------------------------------------------------------------
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// Purpose: Determine if any debug modules were loaded
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//-----------------------------------------------------------------------------
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|
bool Sys_RunningWithDebugModules()
|
|
{
|
|
if ( !s_bRunningWithDebugModules )
|
|
{
|
|
#ifdef IS_WINDOWS_PC
|
|
char chMemoryName[ MAX_PATH ];
|
|
DebugKernelMemoryObjectName( chMemoryName );
|
|
|
|
HANDLE hObject = OpenFileMapping( FILE_MAP_READ, FALSE, chMemoryName );
|
|
if ( hObject && hObject != INVALID_HANDLE_VALUE )
|
|
{
|
|
CloseHandle( hObject );
|
|
s_bRunningWithDebugModules = true;
|
|
}
|
|
#endif
|
|
}
|
|
return s_bRunningWithDebugModules;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: Unloads a DLL/component from
|
|
// Input : *pModuleName - filename of the component
|
|
// Output : opaque handle to the module (hides system dependency)
|
|
//-----------------------------------------------------------------------------
|
|
void Sys_UnloadModule( CSysModule *pModule )
|
|
{
|
|
if ( !pModule )
|
|
return;
|
|
|
|
HMODULE hDLL = reinterpret_cast<HMODULE>(pModule);
|
|
|
|
#ifdef _WIN32
|
|
FreeLibrary( hDLL );
|
|
#elif defined( _PS3 )
|
|
PS3_PrxUnload( ( ( PS3_PrxLoadParametersBase_t *)pModule )->sysPrxId );
|
|
delete ( PS3_PrxLoadParametersBase_t *)pModule;
|
|
#elif defined( POSIX )
|
|
dlclose((void *)hDLL);
|
|
#endif
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: returns a pointer to a function, given a module
|
|
// Input : module - windows HMODULE from Sys_LoadModule()
|
|
// *pName - proc name
|
|
// Output : factory for this module
|
|
//-----------------------------------------------------------------------------
|
|
CreateInterfaceFn Sys_GetFactory( CSysModule *pModule )
|
|
{
|
|
if ( !pModule )
|
|
return NULL;
|
|
|
|
HMODULE hDLL = reinterpret_cast<HMODULE>(pModule);
|
|
#ifdef _WIN32
|
|
return reinterpret_cast<CreateInterfaceFn>(GetProcAddress( hDLL, CREATEINTERFACE_PROCNAME ));
|
|
#elif defined( _PS3 )
|
|
return reinterpret_cast<CreateInterfaceFn>(Sys_GetProcAddress( hDLL, CREATEINTERFACE_PROCNAME ));
|
|
#elif defined( POSIX )
|
|
// Linux gives this error:
|
|
//../public/interface.cpp: In function `IBaseInterface *(*Sys_GetFactory
|
|
//(CSysModule *)) (const char *, int *)':
|
|
//../public/interface.cpp:154: ISO C++ forbids casting between
|
|
//pointer-to-function and pointer-to-object
|
|
//
|
|
// so lets get around it :)
|
|
return (CreateInterfaceFn)(GetProcAddress( (void *)hDLL, CREATEINTERFACE_PROCNAME ));
|
|
#endif
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: returns the instance of this module
|
|
// Output : interface_instance_t
|
|
//-----------------------------------------------------------------------------
|
|
CreateInterfaceFn Sys_GetFactoryThis( void )
|
|
{
|
|
return &CreateInterfaceInternal;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: returns the instance of the named module
|
|
// Input : *pModuleName - name of the module
|
|
// Output : interface_instance_t - instance of that module
|
|
//-----------------------------------------------------------------------------
|
|
CreateInterfaceFn Sys_GetFactory( const char *pModuleName )
|
|
{
|
|
#ifdef _WIN32
|
|
return static_cast<CreateInterfaceFn>( Sys_GetProcAddress( pModuleName, CREATEINTERFACE_PROCNAME ) );
|
|
#elif defined( _PS3 )
|
|
Assert( 0 );
|
|
return NULL;
|
|
#elif defined(POSIX)
|
|
// see Sys_GetFactory( CSysModule *pModule ) for an explanation
|
|
return (CreateInterfaceFn)( Sys_GetProcAddress( pModuleName, CREATEINTERFACE_PROCNAME ) );
|
|
#endif
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: get the interface for the specified module and version
|
|
// Input :
|
|
// Output :
|
|
//-----------------------------------------------------------------------------
|
|
bool Sys_LoadInterface(
|
|
const char *pModuleName,
|
|
const char *pInterfaceVersionName,
|
|
CSysModule **pOutModule,
|
|
void **pOutInterface )
|
|
{
|
|
CSysModule *pMod = Sys_LoadModule( pModuleName );
|
|
if ( !pMod )
|
|
return false;
|
|
|
|
CreateInterfaceFn fn = Sys_GetFactory( pMod );
|
|
if ( !fn )
|
|
{
|
|
Sys_UnloadModule( pMod );
|
|
return false;
|
|
}
|
|
|
|
*pOutInterface = fn( pInterfaceVersionName, NULL );
|
|
if ( !( *pOutInterface ) )
|
|
{
|
|
Sys_UnloadModule( pMod );
|
|
return false;
|
|
}
|
|
|
|
if ( pOutModule )
|
|
*pOutModule = pMod;
|
|
|
|
return true;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: Place this as a singleton at module scope (e.g.) and use it to get the factory from the specified module name.
|
|
//
|
|
// When the singleton goes out of scope (.dll unload if at module scope),
|
|
// then it'll call Sys_UnloadModule on the module so that the refcount is decremented
|
|
// and the .dll actually can unload from memory.
|
|
//-----------------------------------------------------------------------------
|
|
CDllDemandLoader::CDllDemandLoader( char const *pchModuleName ) :
|
|
m_pchModuleName( pchModuleName ),
|
|
m_hModule( 0 ),
|
|
m_bLoadAttempted( false )
|
|
{
|
|
}
|
|
|
|
CDllDemandLoader::~CDllDemandLoader()
|
|
{
|
|
Unload();
|
|
}
|
|
|
|
CreateInterfaceFn CDllDemandLoader::GetFactory()
|
|
{
|
|
if ( !m_hModule && !m_bLoadAttempted )
|
|
{
|
|
m_bLoadAttempted = true;
|
|
m_hModule = Sys_LoadModule( m_pchModuleName );
|
|
}
|
|
|
|
if ( !m_hModule )
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
return Sys_GetFactory( m_hModule );
|
|
}
|
|
|
|
void CDllDemandLoader::Unload()
|
|
{
|
|
if ( m_hModule )
|
|
{
|
|
Sys_UnloadModule( m_hModule );
|
|
m_hModule = 0;
|
|
}
|
|
}
|