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annotate Include/pythread.h @ 79691:05c8928362ee

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Merge __next__ method link fixes with 3.3.
author Ezio Melotti <ezio.melotti@gmail.com>
date Fri, 12 Oct 2012 13:46:37 +0300
parents 2b21fcf3d9a9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 #ifndef Py_PYTHREAD_H
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3 #define Py_PYTHREAD_H
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4
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5 typedef void *PyThread_type_lock;
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6 typedef void *PyThread_type_sema;
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7
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8 #ifdef __cplusplus
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9 extern "C" {
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10 #endif
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12 /* Return status codes for Python lock acquisition. Chosen for maximum
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13 * backwards compatibility, ie failure -> 0, success -> 1. */
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14 typedef enum PyLockStatus {
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15 PY_LOCK_FAILURE = 0,
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16 PY_LOCK_ACQUIRED = 1,
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17 PY_LOCK_INTR
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18 } PyLockStatus;
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19
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20 PyAPI_FUNC(void) PyThread_init_thread(void);
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21 PyAPI_FUNC(long) PyThread_start_new_thread(void (*)(void *), void *);
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22 PyAPI_FUNC(void) PyThread_exit_thread(void);
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23 PyAPI_FUNC(long) PyThread_get_thread_ident(void);
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24
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25 PyAPI_FUNC(PyThread_type_lock) PyThread_allocate_lock(void);
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26 PyAPI_FUNC(void) PyThread_free_lock(PyThread_type_lock);
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27 PyAPI_FUNC(int) PyThread_acquire_lock(PyThread_type_lock, int);
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28 #define WAIT_LOCK 1
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29 #define NOWAIT_LOCK 0
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30
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31 /* PY_TIMEOUT_T is the integral type used to specify timeouts when waiting
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32 on a lock (see PyThread_acquire_lock_timed() below).
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33 PY_TIMEOUT_MAX is the highest usable value (in microseconds) of that
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34 type, and depends on the system threading API.
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35
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36 NOTE: this isn't the same value as `_thread.TIMEOUT_MAX`. The _thread
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37 module exposes a higher-level API, with timeouts expressed in seconds
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38 and floating-point numbers allowed.
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39 */
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40 #if defined(HAVE_LONG_LONG)
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41 #define PY_TIMEOUT_T PY_LONG_LONG
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42 #define PY_TIMEOUT_MAX PY_LLONG_MAX
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43 #else
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44 #define PY_TIMEOUT_T long
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45 #define PY_TIMEOUT_MAX LONG_MAX
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46 #endif
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47
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48 /* In the NT API, the timeout is a DWORD and is expressed in milliseconds */
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49 #if defined (NT_THREADS)
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50 #if (Py_LL(0xFFFFFFFF) * 1000 < PY_TIMEOUT_MAX)
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51 #undef PY_TIMEOUT_MAX
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52 #define PY_TIMEOUT_MAX (Py_LL(0xFFFFFFFF) * 1000)
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53 #endif
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54 #endif
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55
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56 /* If microseconds == 0, the call is non-blocking: it returns immediately
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57 even when the lock can't be acquired.
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58 If microseconds > 0, the call waits up to the specified duration.
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59 If microseconds < 0, the call waits until success (or abnormal failure)
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60
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61 microseconds must be less than PY_TIMEOUT_MAX. Behaviour otherwise is
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62 undefined.
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63
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64 If intr_flag is true and the acquire is interrupted by a signal, then the
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65 call will return PY_LOCK_INTR. The caller may reattempt to acquire the
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66 lock.
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67 */
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68 PyAPI_FUNC(PyLockStatus) PyThread_acquire_lock_timed(PyThread_type_lock,
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69 PY_TIMEOUT_T microseconds,
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70 int intr_flag);
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72 PyAPI_FUNC(void) PyThread_release_lock(PyThread_type_lock);
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73
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74 PyAPI_FUNC(size_t) PyThread_get_stacksize(void);
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75 PyAPI_FUNC(int) PyThread_set_stacksize(size_t);
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76
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77 PyAPI_FUNC(PyObject*) PyThread_GetInfo(void);
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78
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79 /* Thread Local Storage (TLS) API */
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80 PyAPI_FUNC(int) PyThread_create_key(void);
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81 PyAPI_FUNC(void) PyThread_delete_key(int);
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82 PyAPI_FUNC(int) PyThread_set_key_value(int, void *);
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83 PyAPI_FUNC(void *) PyThread_get_key_value(int);
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84 PyAPI_FUNC(void) PyThread_delete_key_value(int key);
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85
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86 /* Cleanup after a fork */
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87 PyAPI_FUNC(void) PyThread_ReInitTLS(void);
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88
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89 #ifdef __cplusplus
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90 }
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91 #endif
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92
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93 #endif /* !Py_PYTHREAD_H */