🛠️🐜 Antkeeper superbuild with dependencies included
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189 lines
4.9 KiB
189 lines
4.9 KiB
/**
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* OpenAL cross platform audio library
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* Copyright (C) 1999-2007 by authors.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* Or go to http://www.gnu.org/copyleft/lgpl.html
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*/
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#include "config.h"
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#include "opthelpers.h"
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#include "threads.h"
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#include <system_error>
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <limits>
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void althrd_setname(const char *name)
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{
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#if defined(_MSC_VER)
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#define MS_VC_EXCEPTION 0x406D1388
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#pragma pack(push,8)
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struct {
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DWORD dwType; // Must be 0x1000.
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LPCSTR szName; // Pointer to name (in user addr space).
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DWORD dwThreadID; // Thread ID (-1=caller thread).
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DWORD dwFlags; // Reserved for future use, must be zero.
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} info;
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#pragma pack(pop)
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info.dwType = 0x1000;
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info.szName = name;
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info.dwThreadID = ~DWORD{0};
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info.dwFlags = 0;
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__try {
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RaiseException(MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info);
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}
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__except(EXCEPTION_CONTINUE_EXECUTION) {
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}
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#undef MS_VC_EXCEPTION
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#else
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(void)name;
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#endif
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}
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namespace al {
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semaphore::semaphore(unsigned int initial)
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{
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if(initial > static_cast<unsigned int>(std::numeric_limits<int>::max()))
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throw std::system_error(std::make_error_code(std::errc::value_too_large));
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mSem = CreateSemaphore(nullptr, initial, std::numeric_limits<int>::max(), nullptr);
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if(mSem == nullptr)
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throw std::system_error(std::make_error_code(std::errc::resource_unavailable_try_again));
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}
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semaphore::~semaphore()
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{ CloseHandle(mSem); }
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void semaphore::post()
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{
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if UNLIKELY(!ReleaseSemaphore(static_cast<HANDLE>(mSem), 1, nullptr))
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throw std::system_error(std::make_error_code(std::errc::value_too_large));
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}
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void semaphore::wait() noexcept
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{ WaitForSingleObject(static_cast<HANDLE>(mSem), INFINITE); }
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bool semaphore::try_wait() noexcept
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{ return WaitForSingleObject(static_cast<HANDLE>(mSem), 0) == WAIT_OBJECT_0; }
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} // namespace al
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#else
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#include <pthread.h>
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#ifdef HAVE_PTHREAD_NP_H
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#include <pthread_np.h>
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#endif
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#include <tuple>
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namespace {
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using setname_t1 = int(*)(const char*);
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using setname_t2 = int(*)(pthread_t, const char*);
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using setname_t3 = int(*)(pthread_t, const char*, void*);
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void setname_caller(setname_t1 func, const char *name)
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{ func(name); }
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void setname_caller(setname_t2 func, const char *name)
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{ func(pthread_self(), name); }
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void setname_caller(setname_t3 func, const char *name)
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{ func(pthread_self(), "%s", static_cast<void*>(const_cast<char*>(name))); }
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} // namespace
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void althrd_setname(const char *name)
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{
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#if defined(HAVE_PTHREAD_SET_NAME_NP)
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setname_caller(pthread_set_name_np, name);
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#elif defined(HAVE_PTHREAD_SETNAME_NP)
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setname_caller(pthread_setname_np, name);
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#endif
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/* Avoid unused function/parameter warnings. */
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std::ignore = name;
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std::ignore = static_cast<void(*)(setname_t1,const char*)>(&setname_caller);
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std::ignore = static_cast<void(*)(setname_t2,const char*)>(&setname_caller);
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std::ignore = static_cast<void(*)(setname_t3,const char*)>(&setname_caller);
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}
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#ifdef __APPLE__
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namespace al {
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semaphore::semaphore(unsigned int initial)
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{
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mSem = dispatch_semaphore_create(initial);
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if(!mSem)
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throw std::system_error(std::make_error_code(std::errc::resource_unavailable_try_again));
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}
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semaphore::~semaphore()
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{ dispatch_release(mSem); }
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void semaphore::post()
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{ dispatch_semaphore_signal(mSem); }
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void semaphore::wait() noexcept
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{ dispatch_semaphore_wait(mSem, DISPATCH_TIME_FOREVER); }
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bool semaphore::try_wait() noexcept
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{ return dispatch_semaphore_wait(mSem, DISPATCH_TIME_NOW) == 0; }
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} // namespace al
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#else /* !__APPLE__ */
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#include <cerrno>
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namespace al {
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semaphore::semaphore(unsigned int initial)
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{
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if(sem_init(&mSem, 0, initial) != 0)
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throw std::system_error(std::make_error_code(std::errc::resource_unavailable_try_again));
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}
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semaphore::~semaphore()
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{ sem_destroy(&mSem); }
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void semaphore::post()
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{
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if(sem_post(&mSem) != 0)
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throw std::system_error(std::make_error_code(std::errc::value_too_large));
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}
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void semaphore::wait() noexcept
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{
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while(sem_wait(&mSem) == -1 && errno == EINTR) {
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}
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}
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bool semaphore::try_wait() noexcept
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{ return sem_trywait(&mSem) == 0; }
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} // namespace al
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#endif /* __APPLE__ */
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#endif /* _WIN32 */
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