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Support for various versions of the pthread draft.

This commit is contained in:
Guido van Rossum 1997-05-13 17:51:13 +00:00
parent 5f15b96c36
commit d6353e2c0e
1 changed files with 64 additions and 12 deletions
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76
Python/thread_pthread.h
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@ -34,25 +34,57 @@ PERFORMANCE OF THIS SOFTWARE.
#include <stdlib.h>
#include <pthread.h>
#ifdef _AIX
#ifndef SCHED_BG_NP
/* try to determine what version of the Pthread Standard is installed.
* this is important, since all sorts of parameter types changed from
* draft to draft and there are several (incompatible) drafts in
* common use. these macros are a start, at least.
* 12 May 1997 -- david arnold <davida@pobox.com>
*/
#if defined(__ultrix) && defined(__mips) && defined(_DECTHREADS_)
/* _DECTHREADS_ is defined in cma.h which is included by pthread.h */
# define PY_PTHREAD_D4
#elif defined(__osf__) && defined (__alpha)
/* _DECTHREADS_ is defined in cma.h which is included by pthread.h */
# if !defined(_PTHREAD_ENV_ALPHA) || defined(_PTHREAD_USE_D4) || defined(PTHREAD_USE_D4)
# define PY_PTHREAD_D4
# else
# define PY_PTHREAD_STD
# endif
#elif defined(_AIX)
/* SCHED_BG_NP is defined if using AIX DCE pthreads
* but it is unsupported by AIX 4 pthreads. Default
* attributes for AIX 4 pthreads equal to NULL. For
* AIX DCE pthreads they should be left unchanged.
*/
#define pthread_attr_default NULL
#define pthread_mutexattr_default NULL
#define pthread_condattr_default NULL
# if !defined(SCHED_BG_NP)
# define PY_PTHREAD_STD
# else
# define PY_PTHREAD_D7
# endif
#elif defined(__unix) && defined(__sparc)
# define PY_PTHREAD_STD
#endif
#else
#define pthread_attr_default ((pthread_attr_t *)0)
#define pthread_mutexattr_default ((pthread_mutexattr_t *)0)
#define pthread_condattr_default ((pthread_condattr_t *)0)
/* set default attribute object for different versions */
#if defined(PY_PTHREAD_D4) || defined(PY_PTHREAD_D7)
# define pthread_attr_default pthread_attr_default
# define pthread_mutexattr_default pthread_mutexattr_default
# define pthread_condattr_default pthread_condattr_default
#elif defined(PY_PTHREAD_STD)
# define pthread_attr_default ((pthread_attr_t *)NULL)
# define pthread_mutexattr_default ((pthread_mutexattr_t *)NULL)
# define pthread_condattr_default ((pthread_condattr_t *)NULL)
#endif
/* A pthread mutex isn't sufficient to model the Python lock type
* because, according to Draft 5 of the docs (P1003.4a/D5), both of the
* following are undefined:
@ -96,10 +128,30 @@ int start_new_thread _P2(func, void (*func) _P((void *)), arg, void *arg)
dprintf(("start_new_thread called\n"));
if (!initialized)
init_thread();
success = pthread_create(&th, pthread_attr_default,
(void* (*) _P((void *)))func, arg);
if (success >= 0)
success = pthread_create(&th,
#if defined(PY_PTHREAD_D4)
pthread_attr_default,
(pthread_startroutine_t)func,
(pthread_addr_t)arg
#elif defined(PY_PTHREAD_D7)
pthread_attr_default,
func,
arg
#elif defined(PY_PTHREAD_STD)
(pthread_attr_t*)NULL,
(void* (*)_P((void *)))func,
(void *)arg
#endif
);
if (success >= 0) {
#if defined(PY_THREAD_D4) || defined(PY_PTHREAD_D7)
pthread_detach(&th);
#elif defined(PY_PTHREAD_STD)
pthread_detach(th);
#endif
}
return success < 0 ? 0 : 1;
}