forked from 0ad/0ad
janwas
78d950e419
win_internal -> win.h (pulls in <windows.h>, with fixes afterwards) remove empty waio_internal and wsysdep Move source/sound license notice into source/sound/license.txt This was SVN commit r5044.
122 lines
3.3 KiB
C++
122 lines
3.3 KiB
C++
/**
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* =========================================================================
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* File : wstartup.cpp
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* Project : 0 A.D.
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* Description : windows-specific entry point and startup code
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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#include "precompiled.h"
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#include "wstartup.h"
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#include "winit.h"
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#include "wdbg.h" // wdbg_exception_filter
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#include "win.h" // GetExceptionInformation
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#if MSC_VERSION >= 1400
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#include <process.h> // __security_init_cookie
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#define NEED_COOKIE_INIT
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#endif
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// this module is responsible for startup and triggering winit's calls to
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// registered functions at the appropriate times. control flow overview:
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// entry [-> RunWithinTryBlock] -> InitAndCallMain -> MainCRTStartup ->
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// main -> wstartup_PreMainInit.
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// our atexit handler is called as the last of them, provided constructors
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// do not use atexit! (this requirement is documented)
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//
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// rationale: see declaration of wstartup_PreMainInit.
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void wstartup_PreMainInit()
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{
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winit_CallPreMainFunctions();
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atexit(winit_CallShutdownFunctions);
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// no point redirecting stdout yet - the current directory
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// may be incorrect (file_set_root not yet called).
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// (w)sdl will take care of it anyway.
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}
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// these aren't defined in VC include files, so we have to do it manually.
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#ifdef USE_WINMAIN
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EXTERN_C int WinMainCRTStartup(void);
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#else
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EXTERN_C int mainCRTStartup(void);
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#endif
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// (moved into a separate function because it's used by both
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// entry and entry_noSEH)
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static int InitAndCallMain()
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{
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// perform all initialization that needs to run before _cinit
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// (i.e. when C++ ctors are called).
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// be very careful to avoid non-stateless libc functions!
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winit_CallPreLibcFunctions();
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int ret;
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#ifdef USE_WINMAIN
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ret = WinMainCRTStartup(); // calls _cinit and then our WinMain
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#else
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ret = mainCRTStartup(); // calls _cinit and then our main
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#endif
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return ret;
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}
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typedef int(*PfnIntVoid)(void);
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static int RunWithinTryBlock(PfnIntVoid func)
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{
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int ret;
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__try
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{
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ret = func();
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}
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__except(wdbg_exception_filter(GetExceptionInformation()))
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{
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ret = -1;
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}
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return ret;
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}
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int entry()
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{
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#ifdef NEED_COOKIE_INIT
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// 2006-02-16 workaround for R6035 on VC8:
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//
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// SEH code compiled with /GS pushes a "security cookie" onto the
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// stack. since we're called before _cinit, the cookie won't have
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// been initialized yet, which would cause the CRT to FatalAppExit.
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// to solve this, we must call __security_init_cookie before any
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// hidden compiler-generated SEH registration code runs,
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// which means the __try block must be moved into a helper function.
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//
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// NB: entry() must not contain local string buffers, either -
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// /GS would install a cookie here as well (same problem).
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//
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// see http://msdn2.microsoft.com/en-US/library/ms235603.aspx
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__security_init_cookie();
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#endif
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return RunWithinTryBlock(InitAndCallMain);
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}
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// Alternative entry point, for programs that don't want the SEH handler
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// (e.g. unit tests, where it's better to let the debugger handle any errors)
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int entry_noSEH()
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{
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#ifdef NEED_COOKIE_INIT
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// see above. this is also necessary here in case pre-libc init
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// functions use SEH.
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__security_init_cookie();
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#endif
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return InitAndCallMain();
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}
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