thread.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2009
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
namespace Gecode { namespace Support {
/*
* Runnable objects
*/
forceinline
Runnable::Runnable(bool d0)
: d(d0) {}
forceinline void
Runnable::todelete(bool d0) {
d=d0;
}
forceinline bool
Runnable::todelete(void) const {
return d;
}
forceinline void
Runnable::operator delete(void* p) {
heap.rfree(p);
}
forceinline void*
Runnable::operator new(size_t s) {
return heap.ralloc(s);
}
/*
* Mutexes
*
*/
forceinline void*
Mutex::operator new(size_t s) {
return Gecode::heap.ralloc(s);
}
forceinline void
Mutex::operator delete(void* p) {
Gecode::heap.rfree(p);
}
#if ! ( defined(GECODE_THREADS_WINDOWS) || defined(GECODE_THREADS_OSX_UNFAIR) || !defined(GECODE_THREADS_PTHREADS_SPINLOCK) )
/*
* Fast mutexes
*
*/
forceinline void*
FastMutex::operator new(size_t s) {
return Gecode::heap.ralloc(s);
}
forceinline void
FastMutex::operator delete(void* p) {
Gecode::heap.rfree(p);
}
#endif
/*
* Locks
*/
forceinline
Lock::Lock(Mutex& m0) : m(m0) {
m.acquire();
}
forceinline
Lock::~Lock(void) {
m.release();
}
/*
* Threads
*/
inline void
Thread::Run::run(Runnable* r0) {
m.acquire();
r = r0;
m.release();
e.signal();
}
inline void
Thread::run(Runnable* r) {
m()->acquire();
if (idle != NULL) {
Run* i = idle;
idle = idle->n;
m()->release();
i->run(r);
} else {
m()->release();
(void) new Run(r);
}
}
forceinline void
Thread::Run::operator delete(void* p) {
heap.rfree(p);
}
forceinline void*
Thread::Run::operator new(size_t s) {
return heap.ralloc(s);
}
}}
// STATISTICS: support-any
Gecode::Support::Lock::~Lock
~Lock(void)
Leave lock.
Definition thread.hpp:99
Gecode::Support::Lock::Lock
Lock(Mutex &m0)
Enter lock.
Definition thread.hpp:95
Gecode::Support::Mutex
A mutex for mutual exclausion among several threads.
Definition thread.hpp:96
Gecode::Support::Mutex::release
void release(void)
Release the mutex.
Definition none.hpp:48
Gecode::Support::Mutex::acquire
void acquire(void)
Acquire the mutex and possibly block.
Definition none.hpp:42
Gecode::Support::Runnable
An interface for objects that can be run by a thread.
Definition thread.hpp:264
Gecode::Support::Runnable::Runnable
Runnable(bool d=true)
Initialize, d defines whether object is deleted when terminated.
Definition thread.hpp:40
Gecode::Support::Runnable::todelete
bool todelete(void) const
Return whether to be deleted upon termination.
Definition thread.hpp:47
Gecode::Support::Thread::Run
A real thread.
Definition thread.hpp:299
Gecode::Support::Thread::Run::run
void run(Runnable *r)
Run a runnable object.
Definition thread.hpp:108
Gecode::Support::Thread::Run::e
Event e
Event to wait for next runnable object to execute.
Definition thread.hpp:306
Gecode::Support::Thread::Run::r
Runnable * r
Runnable object to execute.
Definition thread.hpp:304
Gecode::Support::Thread::Run::m
Mutex m
Mutex for synchronization.
Definition thread.hpp:308
Gecode::Support::Thread::idle
static Run * idle
Idle runners.
Definition thread.hpp:323
Gecode::Support::Thread::run
static void run(Runnable *r)
Construct a new thread and run r.
Definition thread.hpp:115
Gecode::Support::Thread::m
static Mutex * m(void)
Mutex for synchronization.
Definition thread.cpp:42
Gecode::heap
Heap heap
The single global heap.
Definition heap.cpp:44
Gecode::Support
Support algorithms and datastructures
Gecode
Gecode toplevel namespace
forceinline
#define forceinline
Definition config.hpp:187