Atlas - SDL_systls.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2026 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21
22#include "SDL_internal.h"
23
24#ifdef SDL_THREAD_DOS
25
26/* DOS thread-local storage — uses per-thread static array indexed by
27   the scheduler's thread ID. With only DOS_MAX_THREADS (8) threads,
28   a simple static array is efficient and avoids any dynamic allocation. */
29
30#include "../../core/dos/SDL_dos_scheduler.h"
31#include "../SDL_thread_c.h"
32
33static SDL_TLSData *tls_data[DOS_MAX_THREADS];
34
35void SDL_SYS_InitTLSData(void)
36{
37    SDL_memset(tls_data, 0, sizeof(tls_data));
38}
39
40SDL_TLSData *SDL_SYS_GetTLSData(void)
41{
42    int tid = DOS_GetCurrentThreadID();
43    if (tid < 0 || tid >= DOS_MAX_THREADS) {
44        return NULL;
45    }
46    return tls_data[tid];
47}
48
49bool SDL_SYS_SetTLSData(SDL_TLSData *data)
50{
51    int tid = DOS_GetCurrentThreadID();
52    if (tid < 0 || tid >= DOS_MAX_THREADS) {
53        return SDL_SetError("Invalid thread ID for TLS");
54    }
55    tls_data[tid] = data;
56    return true;
57}
58
59void SDL_SYS_QuitTLSData(void)
60{
61    SDL_memset(tls_data, 0, sizeof(tls_data));
62}
63
64#endif /* SDL_THREAD_DOS */
65
[FILE END]
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