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88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>
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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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#ifdef SDL_THREAD_DOS
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/* DOS thread management routines for SDL — cooperative threading via
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the DOS mini-scheduler (no OS-level threads on DOS). */
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#include "../../core/dos/SDL_dos_scheduler.h"
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#include "../SDL_systhread.h"
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#include "../SDL_thread_c.h"
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static int ThreadEntry(void *arg)
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{
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SDL_Thread *thread = (SDL_Thread *)arg;
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SDL_RunThread(thread);
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return 0;
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}
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bool SDL_SYS_CreateThread(SDL_Thread *thread,
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SDL_FunctionPointer pfnBeginThread,
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SDL_FunctionPointer pfnEndThread)
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{
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/* Ensure the scheduler is initialized (idempotent) */
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DOS_SchedulerInit();
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size_t stack_size = thread->stacksize;
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int tid = DOS_CreateThread(ThreadEntry, thread, stack_size);
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if (tid < 0) {
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return SDL_SetError("DOS_CreateThread() failed — no free thread slots");
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}
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thread->handle = tid;
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return true;
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}
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void SDL_SYS_SetupThread(const char *name)
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{
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/* Nothing to do on DOS */
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}
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SDL_ThreadID SDL_GetCurrentThreadID(void)
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{
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return (SDL_ThreadID)DOS_GetCurrentThreadID();
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}
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void SDL_SYS_WaitThread(SDL_Thread *thread)
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{
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DOS_JoinThread(thread->handle);
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DOS_DestroyThread(thread->handle);
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}
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void SDL_SYS_DetachThread(SDL_Thread *thread)
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{
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/* For cooperative threads, detach is a no-op. The thread will clean
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itself up when it finishes. In practice, SDL's thread code handles
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the detach lifecycle via atomics in SDL_RunThread. */
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}
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bool SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority)
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{
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/* DOS cooperative scheduler uses round-robin — priority is not
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meaningful. Accept any value without error. */
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return true;
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}
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#endif /* SDL_THREAD_DOS */
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