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gh-81057: Move Threading-Related Globals to _PyRuntimeState (#100084)

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https://github.com/python/cpython/issues/81057
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Eric Snow 2022-12-08 17:50:58 -07:00 • committed by GitHub
parent bc8cdf8c3d
commit 1160001b34
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11 changed files with 114 additions and 54 deletions
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81
Include/internal/pycore_pythread.h Normal file
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#ifndef Py_INTERNAL_PYTHREAD_H
#define Py_INTERNAL_PYTHREAD_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef Py_BUILD_CORE
# error "this header requires Py_BUILD_CORE define"
#endif
#ifndef _POSIX_THREADS
/* This means pthreads are not implemented in libc headers, hence the macro
not present in unistd.h. But they still can be implemented as an external
library (e.g. gnu pth in pthread emulation) */
# ifdef HAVE_PTHREAD_H
# include <pthread.h> /* _POSIX_THREADS */
# endif
# ifndef _POSIX_THREADS
/* Check if we're running on HP-UX and _SC_THREADS is defined. If so, then
enough of the Posix threads package is implemented to support python
threads.
This is valid for HP-UX 11.23 running on an ia64 system. If needed, add
a check of __ia64 to verify that we're running on an ia64 system instead
of a pa-risc system.
*/
# ifdef __hpux
# ifdef _SC_THREADS
# define _POSIX_THREADS
# endif
# endif
# endif /* _POSIX_THREADS */
#endif /* _POSIX_THREADS */
#if defined(_POSIX_THREADS) && !defined(HAVE_PTHREAD_STUBS)
# define _USE_PTHREADS
#endif
#if defined(_USE_PTHREADS) && defined(HAVE_PTHREAD_CONDATTR_SETCLOCK) && defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
// monotonic is supported statically. It doesn't mean it works on runtime.
# define CONDATTR_MONOTONIC
#endif
#if defined(HAVE_PTHREAD_STUBS)
// pthread_key
struct py_stub_tls_entry {
bool in_use;
void *value;
};
#endif
struct _pythread_runtime_state {
int initialized;
#ifdef _USE_PTHREADS
// This matches when thread_pthread.h is used.
struct {
/* NULL when pthread_condattr_setclock(CLOCK_MONOTONIC) is not supported. */
pthread_condattr_t *ptr;
# ifdef CONDATTR_MONOTONIC
/* The value to which condattr_monotonic is set. */
pthread_condattr_t val;
# endif
} _condattr_monotonic;
#endif // USE_PTHREADS
#if defined(HAVE_PTHREAD_STUBS)
struct {
struct py_stub_tls_entry tls_entries[PTHREAD_KEYS_MAX];
} stubs;
#endif
};
#ifdef __cplusplus
}
#endif
#endif /* !Py_INTERNAL_PYTHREAD_H */