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#ifndef COMMON_ALSEM_H
#define COMMON_ALSEM_H
#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
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 /* COMMON_ALSEM_H */
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