135 lines
3.3 KiB
C++
135 lines
3.3 KiB
C++
/*
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* Copyright (c) 2004, Matthew P. Cashdollar <mpc@innographx.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the author nor the names of any contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// Modelled after JThread by Jori Liesenborgs
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#include "platform.hpp"
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#include "thread.hpp"
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/*
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* Gets the return value of a finished thread
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*/
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void* Thread::get_retval(void)
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{
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void* val;
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running_m.lock();
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if (running)
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val = 0;
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else
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val = retval;
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running_m.unlock();
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return val;
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}
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/*
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* Checks whether the thread is running
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*/
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bool Thread::is_running(void)
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{
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running_m.lock();
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bool r = running;
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running_m.unlock();
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return r;
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}
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/*
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* Stops the thread
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* Generally NOT a good idea
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*/
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void Thread::kill(void)
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{
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running_m.lock();
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#ifndef NDEBUG
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// make sure it as actually running first
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if (!running) {
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running_m.unlock();
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assert(false);
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}
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#endif
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#ifdef WINTHREAD
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BOOL rc = TerminateThread(handle, 0);
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assert(!rc);
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#else
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int rc = pthread_cancel(id);
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assert(!rc);
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#endif
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running = false;
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running_m.unlock();
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}
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/*
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* Starts the thread
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*/
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void Thread::start(void)
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{
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#ifndef NDEBUG
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// check whether the thread is already running
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running_m.lock();
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assert(!running);
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running_m.unlock();
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#endif
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continue_m.lock();
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#ifdef WINTHREAD
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handle = CreateThread(NULL, 0, &the_thread, this, 0, &id);
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assert(handle != NULL);
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#else
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int rc = pthread_create(&id, NULL, &the_thread, this);
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assert(!rc);
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#endif
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// Wait until `running' is set
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running_m.lock();
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while (!running) {
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running_m.unlock();
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running_m.lock();
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}
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running_m.unlock();
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continue_m.unlock();
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}
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/*
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* Wrapper for the thread
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*/
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void* Thread::the_thread(void *param)
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{
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Thread* t = dynamic_cast<Thread*>(param);
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t->running_m.lock();
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t->running = true;
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t->running_m.unlock();
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// wait until we can continue
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t->continue_m.lock();
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t->continue_m.unlock();
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void* ret = t->execute();
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t->running_m.lock();
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t->running = false;
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t->retval = ret;
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t->running_m.unlock();
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return 0;
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}
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