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bpo-6532: Make the thread id an unsigned integer. (#781)

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* bpo-6532: Make the thread id an unsigned integer.

From C API side the type of results of PyThread_start_new_thread() and
PyThread_get_thread_ident(), the id parameter of
PyThreadState_SetAsyncExc(), and the thread_id field of PyThreadState
changed from "long" to "unsigned long".

* Restore a check in thread_get_ident().
This commit is contained in:
Serhiy Storchaka 2017-03-23 15:48:39 +02:00 • committed by Victor Stinner
parent 1e2147b9d7
commit aefa7ebf0f
27 changed files with 116 additions and 88 deletions
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18
Python/thread_pthread.h
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@ -184,7 +184,7 @@ PyThread__init_thread(void)
*/
long
unsigned long
PyThread_start_new_thread(void (*func)(void *), void *arg)
{
pthread_t th;
@ -202,7 +202,7 @@ PyThread_start_new_thread(void (*func)(void *), void *arg)
#if defined(THREAD_STACK_SIZE) || defined(PTHREAD_SYSTEM_SCHED_SUPPORTED)
if (pthread_attr_init(&attrs) != 0)
return -1;
return PYTHREAD_INVALID_THREAD_ID;
#endif
#if defined(THREAD_STACK_SIZE)
tss = (_pythread_stacksize != 0) ? _pythread_stacksize
@ -210,7 +210,7 @@ PyThread_start_new_thread(void (*func)(void *), void *arg)
if (tss != 0) {
if (pthread_attr_setstacksize(&attrs, tss) != 0) {
pthread_attr_destroy(&attrs);
return -1;
return PYTHREAD_INVALID_THREAD_ID;
}
}
#endif
@ -232,31 +232,31 @@ PyThread_start_new_thread(void (*func)(void *), void *arg)
pthread_attr_destroy(&attrs);
#endif
if (status != 0)
return -1;
return PYTHREAD_INVALID_THREAD_ID;
pthread_detach(th);
#if SIZEOF_PTHREAD_T <= SIZEOF_LONG
return (long) th;
return (unsigned long) th;
#else
return (long) *(long *) &th;
return (unsigned long) *(unsigned long *) &th;
#endif
}
/* XXX This implementation is considered (to quote Tim Peters) "inherently
hosed" because:
- It does not guarantee the promise that a non-zero integer is returned.
- The cast to long is inherently unsafe.
- The cast to unsigned long is inherently unsafe.
- It is not clear that the 'volatile' (for AIX?) are any longer necessary.
*/
long
unsigned long
PyThread_get_thread_ident(void)
{
volatile pthread_t threadid;
if (!initialized)
PyThread_init_thread();
threadid = pthread_self();
return (long) threadid;
return (unsigned long) threadid;
}
void