blob: 62d808284d43e1344bf50769089cb8dcffbd38b1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#ifndef AL_THREADS_H
#define AL_THREADS_H
#if defined(__GNUC__) && defined(__i386__)
/* force_align_arg_pointer may be required for proper stack alignment when SSE
* code is used. GCC generates code with the assumption the stack pointer is
* suitably aligned, while some systems (Windows, QNX) do not guarantee non-
* exported functions will be properly aligned when called externally, and
* older apps for other systems may have been built with a lower stack
* alignment than expected by newer builds.
*/
#define FORCE_ALIGN __attribute__((force_align_arg_pointer))
#else
#define FORCE_ALIGN
#endif
#if defined(__APPLE__)
#include <AvailabilityMacros.h>
#include <TargetConditionals.h>
#if (((MAC_OS_X_VERSION_MIN_REQUIRED > 1050) && !defined(__ppc__)) || TARGET_OS_IOS || TARGET_OS_TV)
#include <dispatch/dispatch.h>
#define AL_APPLE_HAVE_DISPATCH 1
#else
#include <semaphore.h> /* Fallback option for Apple without a working libdispatch */
#endif
#elif !defined(_WIN32)
#include <semaphore.h>
#endif
void althrd_setname(const char *name);
namespace al {
class semaphore {
#ifdef _WIN32
using native_type = void*;
#elif defined(AL_APPLE_HAVE_DISPATCH)
using native_type = dispatch_semaphore_t;
#else
using native_type = sem_t;
#endif
native_type mSem;
public:
semaphore(unsigned int initial=0);
semaphore(const semaphore&) = delete;
~semaphore();
semaphore& operator=(const semaphore&) = delete;
void post();
void wait() noexcept;
bool try_wait() noexcept;
};
} // namespace al
#endif /* AL_THREADS_H */
|
