Threads synchronization#
syscalls_phMutexCreate#
GETFROMSTACK(ustack, unsigned int *, h, 0);
GETFROMSTACK(ustack, const struct lockAttr *, attr, 1);
Creates mutex and returns resource handle h. Mutex attributes are specified in attr structure.
syscalls_mutexLock (syscalls_phMutexLock)#
GETFROMSTACK(ustack, unsigned int, h, 0);
Locks mutex given by handle h.
syscalls_mutexTry#
GETFROMSTACK(ustack, unsigned int, h, 0);
Tries to lock mutex given by handle h.
syscalls_mutexUnlock#
GETFROMSTACK(ustack, unsigned int, h, 0);
Unlocks mutex given by h.
syscalls_phCondCreate#
GETFROMSTACK(ustack, unsigned int *, h, 0);
GETFROMSTACK(ustack, const struct condAttr *, attr, 1);
Creates conditional variable and returns its handle in variable h. Conditional variable attributes are specified in
attr structure.
syscalls_condWait (syscalls_phCondWait)#
GETFROMSTACK(ustack, unsigned int, h, 0);
GETFROMSTACK(ustack, unsigned int, m, 1);
GETFROMSTACK(ustack, time_t, timeout, 2);
Waits on conditional given by ‘h’ for number of microseconds given by timeout. Before suspending a calling thread
execution mutex identified by m handle is unlocked to enable other thread modifying variables used to
check conditionals after conditional signalization. When conditional variable is signaled mutex m is locked.
Libc wrapper: int condWait(handle_t h, handle_t m, time_t timeout)
syscalls_condSignal#
GETFROMSTACK(ustack, unsigned int, h, 0);
Signals conditional given by h.
syscalls_condBroadcast#
GETFROMSTACK(ustack, unsigned int, h, 0);
Signals conditional to all waiting threads.