151 lines
3.5 KiB
C++
151 lines
3.5 KiB
C++
//========= Copyright © 1996-2002, Valve LLC, All rights reserved. ============
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================
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#include <string.h>
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#include <stdlib.h>
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#include "interface.h"
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#ifndef _WIN32 // LINUX
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#include <dlfcn.h>
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#include <unistd.h> // getcwd
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#include <stdio.h> // sprintf
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#endif
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// ------------------------------------------------------------------------------------ //
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// InterfaceReg.
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// ------------------------------------------------------------------------------------ //
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InterfaceReg *InterfaceReg::s_pInterfaceRegs = NULL;
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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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// ------------------------------------------------------------------------------------ //
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EXPORT_FUNCTION IBaseInterface *CreateInterface( const char *pName, int *pReturnCode )
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{
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InterfaceReg *pCur;
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for(pCur=InterfaceReg::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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#ifdef _WIN32
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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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#ifdef _WIN32
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HINTERFACEMODULE Sys_LoadModule(const char *pModuleName)
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{
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return (HINTERFACEMODULE)LoadLibrary(pModuleName);
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}
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#else // LINUX
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HINTERFACEMODULE Sys_LoadModule(const char *pModuleName)
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{
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// Linux dlopen() doesn't look in the current directory for libraries.
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// We tell it to, so people don't have to 'install' libraries as root.
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char szCwd[1024];
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char szAbsoluteLibFilename[1024];
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getcwd( szCwd, sizeof( szCwd ) );
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if ( szCwd[ strlen( szCwd ) - 1 ] == '/' )
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szCwd[ strlen( szCwd ) - 1 ] = 0;
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sprintf( szAbsoluteLibFilename, "%s/%s", szCwd, pModuleName );
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return (HINTERFACEMODULE)dlopen( szAbsoluteLibFilename, RTLD_NOW );
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}
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#endif
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#ifdef _WIN32
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void Sys_FreeModule(HINTERFACEMODULE hModule)
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{
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if(!hModule)
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return;
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FreeLibrary((HMODULE)hModule);
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}
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#else // LINUX
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void Sys_FreeModule(HINTERFACEMODULE hModule)
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{
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if(!hModule)
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return;
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dlclose( (void *)hModule );
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}
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#endif
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//-----------------------------------------------------------------------------
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// Purpose: returns the instance of this module
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// Output : interface_instance_t
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//-----------------------------------------------------------------------------
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CreateInterfaceFn Sys_GetFactoryThis( void )
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{
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return CreateInterface;
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}
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//-----------------------------------------------------------------------------
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// Purpose: returns the instance of the named module
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// Input : *pModuleName - name of the module
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// Output : interface_instance_t - instance of that module
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//-----------------------------------------------------------------------------
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#ifdef _WIN32
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CreateInterfaceFn Sys_GetFactory( HINTERFACEMODULE hModule )
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{
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if(!hModule)
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return NULL;
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return (CreateInterfaceFn)GetProcAddress((HMODULE)hModule, CREATEINTERFACE_PROCNAME);
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}
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#else // LINUX
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CreateInterfaceFn Sys_GetFactory( HINTERFACEMODULE hModule )
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{
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if(!hModule)
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return NULL;
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return (CreateInterfaceFn)dlsym( (void *)hModule, CREATEINTERFACE_PROCNAME );
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}
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#endif
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