2021-04-20 15:40:33 -04:00
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/*
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Simple DirectMedia Layer
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2021-05-09 05:30:38 -04:00
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Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
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2021-04-20 15:40:33 -04:00
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_THREAD_OS2
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#include "../../core/os2/SDL_os2.h"
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#include "SDL_thread.h"
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#include "../SDL_thread_c.h"
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#define INCL_DOSPROCESS
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#define INCL_DOSERRORS
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#include <os2.h>
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SDL_TLSData **ppSDLTLSData = NULL;
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static ULONG cTLSAlloc = 0;
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/* SDL_OS2TLSAlloc() called from SDL_InitSubSystem() */
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void SDL_OS2TLSAlloc(void)
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{
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ULONG ulRC;
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if (cTLSAlloc == 0 || ppSDLTLSData == NULL) {
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/* First call - allocate the thread local memory (1 DWORD) */
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ulRC = DosAllocThreadLocalMemory(1, (PULONG *)&ppSDLTLSData);
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if (ulRC != NO_ERROR) {
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debug_os2("DosAllocThreadLocalMemory() failed, rc = %u", ulRC);
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}
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}
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cTLSAlloc++;
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}
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/* SDL_OS2TLSFree() called from SDL_QuitSubSystem() */
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void SDL_OS2TLSFree(void)
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{
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ULONG ulRC;
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if (cTLSAlloc != 0)
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cTLSAlloc--;
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if (cTLSAlloc == 0 && ppSDLTLSData != NULL) {
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/* Last call - free the thread local memory */
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ulRC = DosFreeThreadLocalMemory((PULONG)ppSDLTLSData);
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if (ulRC != NO_ERROR) {
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debug_os2("DosFreeThreadLocalMemory() failed, rc = %u", ulRC);
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} else {
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ppSDLTLSData = NULL;
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}
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}
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}
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SDL_TLSData *SDL_SYS_GetTLSData(void)
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{
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return (ppSDLTLSData == NULL)? NULL : *ppSDLTLSData;
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}
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int SDL_SYS_SetTLSData(SDL_TLSData *data)
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{
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if (!ppSDLTLSData)
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return -1;
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*ppSDLTLSData = data;
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return 0;
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}
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#endif /* SDL_THREAD_OS2 */
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/* vi: set ts=4 sw=4 expandtab: */
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