157 lines
5.3 KiB
C
157 lines
5.3 KiB
C
|
|
#ifndef Py_PYTHREAD_H
|
|
#define Py_PYTHREAD_H
|
|
|
|
typedef void *PyThread_type_lock;
|
|
typedef void *PyThread_type_sema;
|
|
|
|
#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;
|
|
|
|
#ifndef Py_LIMITED_API
|
|
#define PYTHREAD_INVALID_THREAD_ID ((unsigned long)-1)
|
|
#endif
|
|
|
|
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);
|
|
PyAPI_FUNC(unsigned long) PyThread_get_thread_native_id(void);
|
|
|
|
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 (PY_LLONG_MAX / 1000)
|
|
#elif defined (NT_THREADS)
|
|
/* In the NT API, the timeout is a DWORD and is expressed in milliseconds */
|
|
# if 0xFFFFFFFFLL * 1000 < PY_LLONG_MAX
|
|
# define PY_TIMEOUT_MAX (0xFFFFFFFFLL * 1000)
|
|
# else
|
|
# define PY_TIMEOUT_MAX PY_LLONG_MAX
|
|
# endif
|
|
#else
|
|
# define PY_TIMEOUT_MAX PY_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).
|
|
*/
|
|
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) Py_DEPRECATED(3.7);
|
|
|
|
/* Cleanup after a fork */
|
|
PyAPI_FUNC(void) PyThread_ReInitTLS(void) Py_DEPRECATED(3.7);
|
|
|
|
|
|
#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 */
|
|
|
|
#ifndef Py_LIMITED_API
|
|
#if defined(_POSIX_THREADS)
|
|
/* Darwin needs pthread.h to know type name the pthread_key_t. */
|
|
# include <pthread.h>
|
|
# define NATIVE_TSS_KEY_T pthread_key_t
|
|
#elif defined(NT_THREADS)
|
|
/* In Windows, native TSS key type is DWORD,
|
|
but hardcode the unsigned long to avoid errors for include directive.
|
|
*/
|
|
# define NATIVE_TSS_KEY_T unsigned long
|
|
#else
|
|
# error "Require native threads. See https://bugs.python.org/issue31370"
|
|
#endif
|
|
|
|
/* When Py_LIMITED_API is not defined, the type layout of Py_tss_t is
|
|
exposed to allow static allocation in the API clients. Even in this case,
|
|
you must handle TSS keys through API functions due to compatibility.
|
|
*/
|
|
struct _Py_tss_t {
|
|
int _is_initialized;
|
|
NATIVE_TSS_KEY_T _key;
|
|
};
|
|
|
|
#undef NATIVE_TSS_KEY_T
|
|
|
|
/* When static allocation, you must initialize with Py_tss_NEEDS_INIT. */
|
|
#define Py_tss_NEEDS_INIT {0}
|
|
#endif /* !Py_LIMITED_API */
|
|
|
|
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 */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* !Py_PYTHREAD_H */
|