mirror of
https://github.com/bunny-lab-io/Borealis.git
synced 2025-07-28 11:28:29 -06:00
Removed the Requirement to Install Python and NodeJS (Now Bundled with Borealis)
This commit is contained in:
63
Dependencies/Python/include/cpython/lock.h
vendored
Normal file
63
Dependencies/Python/include/cpython/lock.h
vendored
Normal file
@ -0,0 +1,63 @@
|
||||
#ifndef Py_CPYTHON_LOCK_H
|
||||
# error "this header file must not be included directly"
|
||||
#endif
|
||||
|
||||
#define _Py_UNLOCKED 0
|
||||
#define _Py_LOCKED 1
|
||||
|
||||
// A mutex that occupies one byte. The lock can be zero initialized to
|
||||
// represent the unlocked state.
|
||||
//
|
||||
// Typical initialization:
|
||||
// PyMutex m = (PyMutex){0};
|
||||
//
|
||||
// Or initialize as global variables:
|
||||
// static PyMutex m;
|
||||
//
|
||||
// Typical usage:
|
||||
// PyMutex_Lock(&m);
|
||||
// ...
|
||||
// PyMutex_Unlock(&m);
|
||||
//
|
||||
// The contents of the PyMutex are not part of the public API, but are
|
||||
// described to aid in understanding the implementation and debugging. Only
|
||||
// the two least significant bits are used. The remaining bits are always zero:
|
||||
// 0b00: unlocked
|
||||
// 0b01: locked
|
||||
// 0b10: unlocked and has parked threads
|
||||
// 0b11: locked and has parked threads
|
||||
typedef struct PyMutex {
|
||||
uint8_t _bits; // (private)
|
||||
} PyMutex;
|
||||
|
||||
// exported function for locking the mutex
|
||||
PyAPI_FUNC(void) PyMutex_Lock(PyMutex *m);
|
||||
|
||||
// exported function for unlocking the mutex
|
||||
PyAPI_FUNC(void) PyMutex_Unlock(PyMutex *m);
|
||||
|
||||
// Locks the mutex.
|
||||
//
|
||||
// If the mutex is currently locked, the calling thread will be parked until
|
||||
// the mutex is unlocked. If the current thread holds the GIL, then the GIL
|
||||
// will be released while the thread is parked.
|
||||
static inline void
|
||||
_PyMutex_Lock(PyMutex *m)
|
||||
{
|
||||
uint8_t expected = _Py_UNLOCKED;
|
||||
if (!_Py_atomic_compare_exchange_uint8(&m->_bits, &expected, _Py_LOCKED)) {
|
||||
PyMutex_Lock(m);
|
||||
}
|
||||
}
|
||||
#define PyMutex_Lock _PyMutex_Lock
|
||||
|
||||
// Unlocks the mutex.
|
||||
static inline void
|
||||
_PyMutex_Unlock(PyMutex *m)
|
||||
{
|
||||
uint8_t expected = _Py_LOCKED;
|
||||
if (!_Py_atomic_compare_exchange_uint8(&m->_bits, &expected, _Py_UNLOCKED)) {
|
||||
PyMutex_Unlock(m);
|
||||
}
|
||||
}
|
||||
#define PyMutex_Unlock _PyMutex_Unlock
|
Reference in New Issue
Block a user