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/*
Copyright (C) 2001-2002 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "thread.h"
#include "debug.h"
#include "gslglib.h"
#include <pthread.h>
#if defined(__DECCXX)
#define EXTC extern "C"
#else
#define EXTC
#endif
EXTC gpointer
gsl_arts_mutex_new ()
{
return new Arts::Mutex;
}
EXTC void
gsl_arts_mutex_free (gpointer mutex)
{
Arts::Mutex *m = static_cast<Arts::Mutex *>(mutex);
delete m;
}
EXTC void
gsl_arts_mutex_lock (gpointer mutex)
{
Arts::Mutex *m = static_cast<Arts::Mutex *>(mutex);
m->lock();
}
EXTC gboolean
gsl_arts_mutex_trylock (gpointer mutex)
{
Arts::Mutex *m = static_cast<Arts::Mutex *>(mutex);
return m->tryLock();
}
EXTC void
gsl_arts_mutex_unlock (gpointer mutex)
{
Arts::Mutex *m = static_cast<Arts::Mutex *>(mutex);
m->unlock();
}
EXTC gpointer
gsl_arts_cond_new ()
{
return new Arts::ThreadCondition;
}
EXTC void
gsl_arts_cond_free (gpointer cond)
{
Arts::ThreadCondition *c = static_cast<Arts::ThreadCondition *>(cond);
delete c;
}
EXTC void
gsl_arts_cond_signal (gpointer cond)
{
Arts::ThreadCondition *c = static_cast<Arts::ThreadCondition *>(cond);
c->wakeOne();
}
EXTC void
gsl_arts_cond_broadcast (gpointer cond)
{
Arts::ThreadCondition *c = static_cast<Arts::ThreadCondition *>(cond);
c->wakeAll();
}
EXTC void
gsl_arts_cond_wait (gpointer cond, gpointer mutex)
{
Arts::ThreadCondition *c = static_cast<Arts::ThreadCondition *>(cond);
Arts::Mutex *m = static_cast<Arts::Mutex *>(mutex);
c->wait(*m);
}
EXTC void
gsl_arts_cond_timed_wait (gpointer /*cond*/, gpointer /*mutex*/, GTimeVal * /*time*/)
{
arts_assert(false);
}
class GslArtsThread : public Arts::Thread {
protected:
gpointer (*func)(gpointer data);
gpointer data;
gpointer result;
public:
GThread gthread;
GslArtsThread(gpointer (*func)(gpointer data), gpointer data)
: func(func), data(data)
{
gthread.data = 0;
}
void run()
{
result = func(data);
}
};
/* KCC (KAI C++) is buggy. If we write out the type of the first argument
to gsl_arts_thread_create(), ala
gsl_arts_thread_create (gpointer (*func) (gpointer data2), ...)
it becomes C++ linkage, i.e. it's name gets mangled, _despite_ declared
extern "C" in the header. Other sources only calling this function,
i.e. those only seeing the prototype correctly call the unmangled
extern "C" variant, but for the above reason it isn't defined anywhere.
The solution is to go through a typedef for that argument, _which must
also be declared extern "C"_. I'm not sure, but I think it's an error
of KCC, that it puts the invisible type of the first arg into C++ mode,
although the whole function should be C only. If one declares
two equal function types, one extern "C", one not, they are even assignment
compatible. But somehow KCC puts that type into C++ mode, which for
other strange reasons force the whole function to go into C++ linkage.
It's enough, when this typedef is local to this file. (matz) */
/* Due to gcc's unhappyness with 'extern "C" typedef ...' we enclose
it in a real extern "C" {} block. */
extern "C" {
typedef gpointer (*t_func)(gpointer data2);
}
// This is C++:
GThread* gsl_arts_thread_create_full_CPP(gpointer (*func)(gpointer data),
gpointer data,
gulong /*stack_size*/,
gboolean /*joinable*/,
gboolean /*bound*/,
GThreadPriority /*priority*/,
GError ** /*error*/)
{
GslArtsThread *thread = new GslArtsThread(func, data);
return &thread->gthread;
}
// This is C:
extern "C" GThread*
gsl_arts_thread_create_full(gpointer (*func)(gpointer data),
gpointer data,
gulong stack_size,
gboolean joinable,
gboolean bound,
GThreadPriority priority,
GError **error)
{
return gsl_arts_thread_create_full_CPP(func,
data,
stack_size,
joinable,
bound,
priority,
error);
}
EXTC gpointer
gsl_arts_thread_self ()
{
GslArtsThread *current = static_cast<GslArtsThread *>(Arts::SystemThreads::the()->getCurrentThread());
if(current)
return ¤t->gthread;
else
{
static GThread mainThread = { 0, };
return &mainThread;
}
}
EXTC void
gsl_arts_thread_init (gpointer /*arg*/)
{
}
/* vim:set ts=8 sts=2 sw=2: */
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