mirror of
https://github.com/python/cpython
synced 2024-11-05 18:12:54 +00:00
9a1adf2790
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com> Co-authored-by: kj <28750310+Fidget-Spinner@users.noreply.github.com> Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@protonmail.com> Co-authored-by: Victor Stinner <vstinner@python.org>
135 lines
4.8 KiB
C
135 lines
4.8 KiB
C
#ifndef Py_PYTHREAD_H
|
|
#define Py_PYTHREAD_H
|
|
|
|
typedef void *PyThread_type_lock;
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Return status codes for Python lock acquisition. Chosen for maximum
|
|
* backwards compatibility, ie failure -> 0, success -> 1. */
|
|
typedef enum PyLockStatus {
|
|
PY_LOCK_FAILURE = 0,
|
|
PY_LOCK_ACQUIRED = 1,
|
|
PY_LOCK_INTR
|
|
} PyLockStatus;
|
|
|
|
PyAPI_FUNC(void) PyThread_init_thread(void);
|
|
PyAPI_FUNC(unsigned long) PyThread_start_new_thread(void (*)(void *), void *);
|
|
PyAPI_FUNC(void) _Py_NO_RETURN PyThread_exit_thread(void);
|
|
PyAPI_FUNC(unsigned long) PyThread_get_thread_ident(void);
|
|
|
|
#if (defined(__APPLE__) || defined(__linux__) || defined(_WIN32) \
|
|
|| defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
|
|
|| defined(__DragonFly__) || defined(_AIX))
|
|
#define PY_HAVE_THREAD_NATIVE_ID
|
|
PyAPI_FUNC(unsigned long) PyThread_get_thread_native_id(void);
|
|
#endif
|
|
|
|
PyAPI_FUNC(PyThread_type_lock) PyThread_allocate_lock(void);
|
|
PyAPI_FUNC(void) PyThread_free_lock(PyThread_type_lock);
|
|
PyAPI_FUNC(int) PyThread_acquire_lock(PyThread_type_lock, int);
|
|
#define WAIT_LOCK 1
|
|
#define NOWAIT_LOCK 0
|
|
|
|
/* PY_TIMEOUT_T is the integral type used to specify timeouts when waiting
|
|
on a lock (see PyThread_acquire_lock_timed() below).
|
|
PY_TIMEOUT_MAX is the highest usable value (in microseconds) of that
|
|
type, and depends on the system threading API.
|
|
|
|
NOTE: this isn't the same value as `_thread.TIMEOUT_MAX`. The _thread
|
|
module exposes a higher-level API, with timeouts expressed in seconds
|
|
and floating-point numbers allowed.
|
|
*/
|
|
#define PY_TIMEOUT_T long long
|
|
|
|
#if defined(_POSIX_THREADS)
|
|
/* PyThread_acquire_lock_timed() uses _PyTime_FromNanoseconds(us * 1000),
|
|
convert microseconds to nanoseconds. */
|
|
# define PY_TIMEOUT_MAX (LLONG_MAX / 1000)
|
|
#elif defined (NT_THREADS)
|
|
// WaitForSingleObject() accepts timeout in milliseconds in the range
|
|
// [0; 0xFFFFFFFE] (DWORD type). INFINITE value (0xFFFFFFFF) means no
|
|
// timeout. 0xFFFFFFFE milliseconds is around 49.7 days.
|
|
# if 0xFFFFFFFELL * 1000 < LLONG_MAX
|
|
# define PY_TIMEOUT_MAX (0xFFFFFFFELL * 1000)
|
|
# else
|
|
# define PY_TIMEOUT_MAX LLONG_MAX
|
|
# endif
|
|
#else
|
|
# define PY_TIMEOUT_MAX LLONG_MAX
|
|
#endif
|
|
|
|
|
|
/* If microseconds == 0, the call is non-blocking: it returns immediately
|
|
even when the lock can't be acquired.
|
|
If microseconds > 0, the call waits up to the specified duration.
|
|
If microseconds < 0, the call waits until success (or abnormal failure)
|
|
|
|
microseconds must be less than PY_TIMEOUT_MAX. Behaviour otherwise is
|
|
undefined.
|
|
|
|
If intr_flag is true and the acquire is interrupted by a signal, then the
|
|
call will return PY_LOCK_INTR. The caller may reattempt to acquire the
|
|
lock.
|
|
*/
|
|
PyAPI_FUNC(PyLockStatus) PyThread_acquire_lock_timed(PyThread_type_lock,
|
|
PY_TIMEOUT_T microseconds,
|
|
int intr_flag);
|
|
|
|
PyAPI_FUNC(void) PyThread_release_lock(PyThread_type_lock);
|
|
|
|
PyAPI_FUNC(size_t) PyThread_get_stacksize(void);
|
|
PyAPI_FUNC(int) PyThread_set_stacksize(size_t);
|
|
|
|
#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000
|
|
PyAPI_FUNC(PyObject*) PyThread_GetInfo(void);
|
|
#endif
|
|
|
|
|
|
/* Thread Local Storage (TLS) API
|
|
TLS API is DEPRECATED. Use Thread Specific Storage (TSS) API.
|
|
|
|
The existing TLS API has used int to represent TLS keys across all
|
|
platforms, but it is not POSIX-compliant. Therefore, the new TSS API uses
|
|
opaque data type to represent TSS keys to be compatible (see PEP 539).
|
|
*/
|
|
Py_DEPRECATED(3.7) PyAPI_FUNC(int) PyThread_create_key(void);
|
|
Py_DEPRECATED(3.7) PyAPI_FUNC(void) PyThread_delete_key(int key);
|
|
Py_DEPRECATED(3.7) PyAPI_FUNC(int) PyThread_set_key_value(int key,
|
|
void *value);
|
|
Py_DEPRECATED(3.7) PyAPI_FUNC(void *) PyThread_get_key_value(int key);
|
|
Py_DEPRECATED(3.7) PyAPI_FUNC(void) PyThread_delete_key_value(int key);
|
|
|
|
/* Cleanup after a fork */
|
|
Py_DEPRECATED(3.7) PyAPI_FUNC(void) PyThread_ReInitTLS(void);
|
|
|
|
|
|
#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03070000
|
|
/* New in 3.7 */
|
|
/* Thread Specific Storage (TSS) API */
|
|
|
|
typedef struct _Py_tss_t Py_tss_t; /* opaque */
|
|
|
|
PyAPI_FUNC(Py_tss_t *) PyThread_tss_alloc(void);
|
|
PyAPI_FUNC(void) PyThread_tss_free(Py_tss_t *key);
|
|
|
|
/* The parameter key must not be NULL. */
|
|
PyAPI_FUNC(int) PyThread_tss_is_created(Py_tss_t *key);
|
|
PyAPI_FUNC(int) PyThread_tss_create(Py_tss_t *key);
|
|
PyAPI_FUNC(void) PyThread_tss_delete(Py_tss_t *key);
|
|
PyAPI_FUNC(int) PyThread_tss_set(Py_tss_t *key, void *value);
|
|
PyAPI_FUNC(void *) PyThread_tss_get(Py_tss_t *key);
|
|
#endif /* New in 3.7 */
|
|
|
|
#ifndef Py_LIMITED_API
|
|
# define Py_CPYTHON_PYTHREAD_H
|
|
# include "cpython/pythread.h"
|
|
# undef Py_CPYTHON_PYTHREAD_H
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif /* !Py_PYTHREAD_H */
|