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Copy pathSDL_systls.c
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89 lines (69 loc) · 2.36 KB
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#ifdef SDL_THREAD_OS2
#include "../../core/os2/SDL_os2.h"
#include "SDL_thread.h"
#include "../SDL_thread_c.h"
#define INCL_DOSPROCESS
#define INCL_DOSERRORS
#include <os2.h>
SDL_TLSData **ppSDLTLSData = NULL;
static ULONG cTLSAlloc = 0;
/* SDL_OS2TLSAlloc() called from SDL_InitSubSystem() */
void SDL_OS2TLSAlloc(void)
{
ULONG ulRC;
if (cTLSAlloc == 0 || !ppSDLTLSData) {
/* First call - allocate the thread local memory (1 DWORD) */
ulRC = DosAllocThreadLocalMemory(1, (PULONG *)&ppSDLTLSData);
if (ulRC != NO_ERROR) {
debug_os2("DosAllocThreadLocalMemory() failed, rc = %u", ulRC);
}
}
cTLSAlloc++;
}
/* SDL_OS2TLSFree() called from SDL_QuitSubSystem() */
void SDL_OS2TLSFree(void)
{
ULONG ulRC;
if (cTLSAlloc != 0)
cTLSAlloc--;
if (cTLSAlloc == 0 && ppSDLTLSData) {
/* Last call - free the thread local memory */
ulRC = DosFreeThreadLocalMemory((PULONG)ppSDLTLSData);
if (ulRC != NO_ERROR) {
debug_os2("DosFreeThreadLocalMemory() failed, rc = %u", ulRC);
} else {
ppSDLTLSData = NULL;
}
}
}
SDL_TLSData *SDL_SYS_GetTLSData(void)
{
return (!ppSDLTLSData)? NULL : *ppSDLTLSData;
}
int SDL_SYS_SetTLSData(SDL_TLSData *data)
{
if (!ppSDLTLSData)
return -1;
*ppSDLTLSData = data;
return 0;
}
#endif /* SDL_THREAD_OS2 */
/* vi: set ts=4 sw=4 expandtab: */