/usr/include/seqan/system/system_mutex.h is in seqan-dev 1.3.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// SeqAn - The Library for Sequence Analysis
// ==========================================================================
// Copyright (c) 2006-2010, Knut Reinert, FU Berlin
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of Knut Reinert or the FU Berlin nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL KNUT REINERT OR THE FU BERLIN BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.
//
// ==========================================================================
// Author: David Weese <david.weese@fu-berlin.de>
// ==========================================================================
//SEQAN_NO_GENERATED_FORWARDS: no forwards are generated for this file
#ifndef SEQAN_HEADER_SYSTEM_MUTEX_H
#define SEQAN_HEADER_SYSTEM_MUTEX_H
namespace SEQAN_NAMESPACE_MAIN
{
#ifdef PLATFORM_WINDOWS
static SECURITY_ATTRIBUTES MutexDefaultAttributes = {
sizeof(SECURITY_ATTRIBUTES),
NULL,
true
};
struct Mutex
{
typedef HANDLE Handle;
Handle hMutex;
Mutex():
hMutex(NULL) {}
Mutex(BOOL initial) {
SEQAN_DO_SYS2(open(initial), "Could not create Mutex");
}
~Mutex() {
if (*this)
SEQAN_DO_SYS2(close(), "Could not destroy Mutex");
}
inline bool open(BOOL initial = false) {
return (hMutex = CreateMutex(&MutexDefaultAttributes, initial, NULL)) != NULL;
}
inline bool close() {
bool success = CloseHandle(hMutex);
hMutex = NULL;
return success;
}
inline bool lock(DWORD timeout_millis = INFINITE) {
return WaitForSingleObject(hMutex, timeout_millis) != WAIT_TIMEOUT;
}
inline bool unlock() {
return ReleaseMutex(hMutex) != 0;
}
inline operator bool() const {
return hMutex != NULL;
}
private:
Mutex(Mutex const &) {
// resource copying is not yet supported (performance reason)
// it needs a reference counting technique
}
};
#else
struct Mutex
{
typedef pthread_mutex_t* Handle;
pthread_mutex_t data, *hMutex;
Mutex():
hMutex(NULL) {}
Mutex(bool initial) {
SEQAN_DO_SYS(open(initial));
}
~Mutex() {
if (*this)
SEQAN_DO_SYS(close());
}
inline bool open(bool initial = false)
{
if (!pthread_mutex_init(&data, NULL) && (hMutex = &data)) {
if (initial) return lock();
return true;
} else
return false;
}
inline bool close() {
bool success = (pthread_mutex_destroy(hMutex) == 0);
hMutex = NULL;
return success;
}
inline bool lock() {
return !pthread_mutex_lock(hMutex);
}
inline bool unlock() {
return !pthread_mutex_unlock(hMutex);
}
inline operator bool() const {
return hMutex != NULL;
}
private:
Mutex(Mutex const &) {
// resource copying is not yet supported (performance reason)
// it needs a reference counting technique
}
};
#endif
//////////////////////////////////////////////////////////////////////////////
// global mutex functions
inline bool open(Mutex &m, bool initial) {
return m.open(initial);
}
inline bool open(Mutex &m) {
return open(m, false);
}
inline bool close(Mutex &m) {
return m.close();
}
inline bool lock(Mutex &m) {
return m.lock();
}
inline bool unlock(Mutex &m) {
return m.unlock();
}
}
#endif
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