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iphb_wait(iphb_t iphbh, unsigned short mintime, unsigned short maxtime, int must_wait);
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Wait for the next heartbeat.
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There can be only one wakeup / iphb handle. Calling this function cancels
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any previously programmed wakeup. Using zero for both mintime and maxtime
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can be used to cancel without programming a new wakeup.
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If mintime == maxtime, a global wakeup slot is used rather than ranged
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wakeup. To maximize changes of synchronous wakeups the predefined
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IPHB_GS_WAIT_* values should be used.
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@param iphbh Handle got from iphb_open
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@param mintime Time in seconds that MUST be waited before heartbeat
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@param maxtime Time in seconds when the wait SHOULD end. It is wise to
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have maxtime-mintime quite big to maximize chances that
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other iphb clients can be woken up in sync.
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@param must_wait If non-zero, this functions waits for the wakeup before
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returning. Zero value means you need to use select/poll
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and wait for the socket to become readable. The file
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descriptor to wait for can be queried via iphb_get_fd().
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Once the socket comes readable, the incoming data must
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be flushed - iphb_discard_wakeups can be used for this.
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@param resume If nonzero, the device is woken from suspend to end the
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wait period. Use zero value if the client process can
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wait until the device gets out of suspend for some other
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@return Time waited, (time_t)-1 if error (check errno)
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iphb_wait2(iphb_t iphbh, unsigned mintime, unsigned maxtime, int must_wait,
added
removed
src/libiphb.h
