Unblock a thread that's waiting on a condition variable
#include <threads.h> int cnd_signal( cnd_t* cond );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The cnd_signal() function unblocks the highest priority thread that's waiting on the condition variable, cond. If more than one thread at the highest priority is waiting, cnd_signal() unblocks the one that has been waiting the longest.
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | Yes |
| Thread | Yes |