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/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
All Rights Reserved
Copyright (c) 2000, BeOpen.com.
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
All rights reserved.
See the file "Misc/COPYRIGHT" for information on usage and
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
******************************************************************/
/* This code implemented by cvale@netcom.com */
#define INCL_DOSPROCESS
#define INCL_DOSSEMAPHORES
#include "os2.h"
#include "limits.h"
#include "process.h"
long PyThread_get_thread_ident(void);
/*
* Initialization of the C package, should not be needed.
*/
static void
PyThread__init_thread(void)
{
}
/*
* Thread support.
*/
int
PyThread_start_new_thread(void (*func)(void *), void *arg)
{
int aThread;
int success = 1;
aThread = _beginthread(func,NULL,65536,arg);
if( aThread == -1 ) {
success = 0;
fprintf(stderr,"aThread failed == %d",aThread);
dprintf(("_beginthread failed. return %ld\n", errno));
}
return success;
}
long
PyThread_get_thread_ident(void)
{
PPIB pib;
PTIB tib;
if (!initialized)
PyThread_init_thread();
DosGetInfoBlocks(&tib,&pib);
return tib->tib_ptib2->tib2_ultid;
}
static void
do_PyThread_exit_thread(int no_cleanup)
{
dprintf(("%ld: PyThread_exit_thread called\n", PyThread_get_thread_ident()));
if (!initialized)
if (no_cleanup)
_exit(0);
else
exit(0);
_endthread();
}
void
PyThread_exit_thread(void)
{
do_PyThread_exit_thread(0);
}
void
PyThread__exit_thread(void)
{
do_PyThread_exit_thread(1);
}
#ifndef NO_EXIT_PROG
static void
do_PyThread_exit_prog(int status, int no_cleanup)
{
dprintf(("PyThread_exit_prog(%d) called\n", status));
if (!initialized)
if (no_cleanup)
_exit(status);
else
exit(status);
}
void
PyThread_exit_prog(int status)
{
do_PyThread_exit_prog(status, 0);
}
void
PyThread__exit_prog(int status)
{
do_PyThread_exit_prog(status, 1);
}
#endif /* NO_EXIT_PROG */
/*
* Lock support. It has too be implemented as semaphores.
* I [Dag] tried to implement it with mutex but I could find a way to
* tell whether a thread already own the lock or not.
*/
PyThread_type_lock
PyThread_allocate_lock(void)
{
HMTX aLock;
APIRET rc;
dprintf(("PyThread_allocate_lock called\n"));
if (!initialized)
PyThread_init_thread();
DosCreateMutexSem(NULL, /* Sem name */
&aLock, /* the semaphore */
0, /* shared ? */
0); /* initial state */
dprintf(("%ld: PyThread_allocate_lock() -> %p\n", PyThread_get_thread_ident(), aLock));
return (PyThread_type_lock) aLock;
}
void
PyThread_free_lock(PyThread_type_lock aLock)
{
dprintf(("%ld: PyThread_free_lock(%p) called\n", PyThread_get_thread_ident(),aLock));
DosCloseMutexSem((HMTX)aLock);
}
/*
* Return 1 on success if the lock was acquired
*
* and 0 if the lock was not acquired. This means a 0 is returned
* if the lock has already been acquired by this thread!
*/
int
PyThread_acquire_lock(PyThread_type_lock aLock, int waitflag)
{
int success = 1;
ULONG rc, count;
PID pid = 0;
TID tid = 0;
dprintf(("%ld: PyThread_acquire_lock(%p, %d) called\n", PyThread_get_thread_ident(),
aLock, waitflag));
DosQueryMutexSem((HMTX)aLock,&pid,&tid,&count);
if( tid == PyThread_get_thread_ident() ) { /* if we own this lock */
success = 0;
} else {
rc = DosRequestMutexSem((HMTX) aLock,
(waitflag == 1 ? SEM_INDEFINITE_WAIT : 0));
if( rc != 0) {
success = 0; /* We failed */
}
}
dprintf(("%ld: PyThread_acquire_lock(%p, %d) -> %d\n",
PyThread_get_thread_ident(),aLock, waitflag, success));
return success;
}
void
PyThread_release_lock(PyThread_type_lock aLock)
{
dprintf(("%ld: PyThread_release_lock(%p) called\n", PyThread_get_thread_ident(),aLock));
if ( DosReleaseMutexSem( (HMTX) aLock ) != 0 ) {
dprintf(("%ld: Could not PyThread_release_lock(%p) error: %l\n",
PyThread_get_thread_ident(), aLock, GetLastError()));
}
}
/*
* Semaphore support.
*/
PyThread_type_sema
PyThread_allocate_sema(int value)
{
return (PyThread_type_sema) 0;
}
void
PyThread_free_sema(PyThread_type_sema aSemaphore)
{
}
int
PyThread_down_sema(PyThread_type_sema aSemaphore, int waitflag)
{
return -1;
}
void
PyThread_up_sema(PyThread_type_sema aSemaphore)
{
dprintf(("%ld: PyThread_up_sema(%p)\n", PyThread_get_thread_ident(), aSemaphore));
}
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