SDL 2.0
SDL_systls.c
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1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
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#if SDL_THREAD_WINDOWS
25
26#include "../../core/windows/SDL_windows.h"
27
28#include "SDL_thread.h"
29#include "../SDL_thread_c.h"
30
31#if WINAPI_FAMILY_WINRT
32#include <fibersapi.h>
33
34#ifndef TLS_OUT_OF_INDEXES
35#define TLS_OUT_OF_INDEXES FLS_OUT_OF_INDEXES
36#endif
37
38#define TlsAlloc() FlsAlloc(NULL)
39#define TlsSetValue FlsSetValue
40#define TlsGetValue FlsGetValue
41#endif
42
43static DWORD thread_local_storage = TLS_OUT_OF_INDEXES;
45
48{
49 if (thread_local_storage == TLS_OUT_OF_INDEXES && !generic_local_storage) {
50 static SDL_SpinLock lock;
52 if (thread_local_storage == TLS_OUT_OF_INDEXES && !generic_local_storage) {
53 DWORD storage = TlsAlloc();
54 if (storage != TLS_OUT_OF_INDEXES) {
56 thread_local_storage = storage;
57 } else {
59 }
60 }
62 }
65 }
67 return (SDL_TLSData *)TlsGetValue(thread_local_storage);
68}
69
70int
72{
75 }
76 if (!TlsSetValue(thread_local_storage, data)) {
77 return SDL_SetError("TlsSetValue() failed");
78 }
79 return 0;
80}
81
82#endif /* SDL_THREAD_WINDOWS */
83
84/* vi: set ts=4 sw=4 expandtab: */
#define SDL_MemoryBarrierRelease()
Definition: SDL_atomic.h:207
int SDL_SpinLock
Definition: SDL_atomic.h:89
#define SDL_MemoryBarrierAcquire()
Definition: SDL_atomic.h:208
#define SDL_SetError
#define SDL_AtomicLock
#define SDL_AtomicUnlock
SDL_mutex * lock
Definition: SDL_events.c:76
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
SDL_bool
Definition: SDL_stdinc.h:162
@ SDL_TRUE
Definition: SDL_stdinc.h:164
@ SDL_FALSE
Definition: SDL_stdinc.h:163
int SDL_Generic_SetTLSData(SDL_TLSData *storage)
Definition: SDL_thread.c:163
SDL_TLSData * SDL_Generic_GetTLSData(void)
Definition: SDL_thread.c:124
SDL_TLSData * SDL_SYS_GetTLSData(void)
Definition: SDL_systls.c:27
int SDL_SYS_SetTLSData(SDL_TLSData *data)
Definition: SDL_systls.c:33
static pthread_key_t thread_local_storage
Definition: SDL_systls.c:31
static SDL_bool generic_local_storage
Definition: SDL_systls.c:32