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cpputils / deps / glfw / src / posix_thread.c
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1//========================================================================
2// GLFW 3.3 POSIX - www.glfw.org
3//------------------------------------------------------------------------
4// Copyright (c) 2002-2006 Marcus Geelnard
5// Copyright (c) 2006-2017 Camilla Löwy <elmindreda@glfw.org>
6//
7// This software is provided 'as-is', without any express or implied
8// warranty. In no event will the authors be held liable for any damages
9// arising from the use of this software.
10//
11// Permission is granted to anyone to use this software for any purpose,
12// including commercial applications, and to alter it and redistribute it
13// freely, subject to the following restrictions:
14//
15// 1. The origin of this software must not be misrepresented; you must not
16// claim that you wrote the original software. If you use this software
17// in a product, an acknowledgment in the product documentation would
18// be appreciated but is not required.
19//
20// 2. Altered source versions must be plainly marked as such, and must not
21// be misrepresented as being the original software.
22//
23// 3. This notice may not be removed or altered from any source
24// distribution.
25//
26//========================================================================
27// It is fine to use C99 in this file because it will not be built with VS
28//========================================================================
29
30#include "internal.h"
31
32#include <assert.h>
33#include <string.h>
34
35
36//////////////////////////////////////////////////////////////////////////
37////// GLFW platform API //////
38//////////////////////////////////////////////////////////////////////////
39
40GLFWbool _glfwPlatformCreateTls(_GLFWtls* tls)
41{
42 assert(tls->posix.allocated == GLFW_FALSE);
43
44 if (pthread_key_create(&tls->posix.key, NULL) != 0)
45 {
46 _glfwInputError(GLFW_PLATFORM_ERROR,
47 "POSIX: Failed to create context TLS");
48 return GLFW_FALSE;
49 }
50
51 tls->posix.allocated = GLFW_TRUE;
52 return GLFW_TRUE;
53}
54
55void _glfwPlatformDestroyTls(_GLFWtls* tls)
56{
57 if (tls->posix.allocated)
58 pthread_key_delete(tls->posix.key);
59 memset(tls, 0, sizeof(_GLFWtls));
60}
61
62void* _glfwPlatformGetTls(_GLFWtls* tls)
63{
64 assert(tls->posix.allocated == GLFW_TRUE);
65 return pthread_getspecific(tls->posix.key);
66}
67
68void _glfwPlatformSetTls(_GLFWtls* tls, void* value)
69{
70 assert(tls->posix.allocated == GLFW_TRUE);
71 pthread_setspecific(tls->posix.key, value);
72}
73
74GLFWbool _glfwPlatformCreateMutex(_GLFWmutex* mutex)
75{
76 assert(mutex->posix.allocated == GLFW_FALSE);
77
78 if (pthread_mutex_init(&mutex->posix.handle, NULL) != 0)
79 {
80 _glfwInputError(GLFW_PLATFORM_ERROR, "POSIX: Failed to create mutex");
81 return GLFW_FALSE;
82 }
83
84 return mutex->posix.allocated = GLFW_TRUE;
85}
86
87void _glfwPlatformDestroyMutex(_GLFWmutex* mutex)
88{
89 if (mutex->posix.allocated)
90 pthread_mutex_destroy(&mutex->posix.handle);
91 memset(mutex, 0, sizeof(_GLFWmutex));
92}
93
94void _glfwPlatformLockMutex(_GLFWmutex* mutex)
95{
96 assert(mutex->posix.allocated == GLFW_TRUE);
97 pthread_mutex_lock(&mutex->posix.handle);
98}
99
100void _glfwPlatformUnlockMutex(_GLFWmutex* mutex)
101{
102 assert(mutex->posix.allocated == GLFW_TRUE);
103 pthread_mutex_unlock(&mutex->posix.handle);
104}
105