| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2021 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" |
| |
| #if 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 == NULL) { |
| /* 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 != NULL) { |
| /* 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)? 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: */ |