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Subsections


4.10.2 cnd

The cnd class implements condition variables, which can be used in conjunction with the mtx class to wait for a condition to occur.

4.10.2.1 API

void cnd_new(cw_cnd_t *a_cnd):

Input(s):
a_cnd:
Pointer to space for a cnd.
Output(s):
None.
Exception(s):
None.
Description:
Constructor.
void cnd_delete(cw_cnd_t *a_cnd):

Input(s):
a_cnd:
Pointer to a cnd.
Output(s):
None.
Exception(s):
None.
Description:
Destructor.
void cnd_signal(cw_cnd_t *a_cnd):

Input(s):
a_cnd:
Pointer to a cnd.
Output(s):
None.
Exception(s):
None.
Description:
Signal one thread waiting on a_cnd, if there are any waiters.
void cnd_broadcast(cw_cnd_t *a_cnd):

Input(s):
a_cnd:
Pointer to a cnd.
Output(s):
None.
Exception(s):
None.
Description:
Signal all threads waiting on a_cnd.
bool cnd_timedwait(cw_cnd_t *a_cnd, cw_mtx_t *a_mtx, const struct timespec *a_timeout):

Input(s):
a_cnd:
Pointer to a cnd.
a_mtx:
Pointer to a mtx.
a_timeout:
Timeout, specified as an absolute time interval.
Output(s):
retval:
false:
Success.
true:
Timeout.
Exception(s):
None.
Description:
Wait for a_cnd for at least a_time.
void cnd_wait(cw_cnd_t *a_cnd, cw_mtx_t *a_mtx):

Input(s):
a_cnd:
Pointer to a cnd.
a_mtx:
Pointer to a mtx.
Output(s):
None.
Exception(s):
None.
Description:
Wait for a_cnd.


next up previous contents index
Next: 4.10.3 dch Up: 4.10 Classes Previous: 4.10.1 ch   Contents   Index
Jason Evans 2005-03-16