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57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/*
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Copyright (C) 2014 Szilard Biro
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Copyright (C) 2018 Harry Sintonen
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Copyright (C) 2019 Stefan "Bebbo" Franke - AmigaOS 3 port
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "pthread_intern.h"
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#include "debug.h"
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int pthread_mutex_lock(pthread_mutex_t *mutex)
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{
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struct SignalSemaphore *sem;
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D(bug("%s(%p)\n", __FUNCTION__, mutex));
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if (mutex == NULL)
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return EINVAL;
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sem = &mutex->semaphore;
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// initialize static mutexes
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if (SemaphoreIsInvalid(sem))
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_pthread_mutex_init(mutex, NULL, TRUE);
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// normal mutexes would simply deadlock here
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if (mutex->kind == PTHREAD_MUTEX_ERRORCHECK && SemaphoreIsMine(sem))
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return EDEADLK;
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ObtainSemaphore(sem);
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#if 0 // let's just deadlock here, to be compatible with normal mutexes on other platforms
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if (mutex->kind == PTHREAD_MUTEX_NORMAL && sem->ss_NestCount > 1) {
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// should have blocked - fix this
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ReleaseSemaphore(sem);
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return EDEADLK;
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}
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#endif
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return 0;
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}
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