RSM_INTR_SIGNAL_POST(3RSM) Remote Shared Memory Library Functions


NAME


rsm_intr_signal_post, rsm_intr_signal_wait - signal or wait for an event

SYNOPSIS


cc [ flag... ] file... -lrsm [ library... ]
#include <rsmapi.h>

int rsm_intr_signal_post(void *memseg, uint_t flags);


int rsm_intr_signal_wait(void *memseg, int timeout);


DESCRIPTION


The rsm_intr_signal_post() and rsm_intr_signal_wait() functions are
event functions that allow synchronization between importer processes and
exporter processes. A process may block to wait for an event occurrence
by calling rsm_intr_signal_wait(). A process can signal a waiting process
when an event occurs by calling rsm_intr_signal_post().


The rsm_intr_signal_post() function signals an event occurrence. Either
an import segment handle (rsm_memseg_import_handle_t) or an export
segment handle (rsm_memseg_export_handle_t) may be type cast to a void
pointer for the memseg argument. If memseg refers to an import handle,
the exporting process is signalled. If memseg refers to an export handle,
all importers of that segment are signalled. The flags argument may be
set to RSM_SIGPOST_NO_ACCUMULATE; this will cause this event to be
discarded if an event is already pending for the target segment.


The rsm_intr_signal_wait() function allows a process to block and wait
for an event occurrence. Either an import segment handle
(rsm_memseg_import_handle_t) or an export segment handle
(rsm_memseg_export_handle_t) may be type cast to a void pointer for the
memseg argument. The process blocks for up to timeout milliseconds for an
event to occur; if the timeout value is -1, the process blocks until an
event occurs or until interrupted.

RETURN VALUES


Upon successful completion, these functions return 0. Otherwise, an
error value is returned to indicate the error.

ERRORS


The rsm_intr_signal_post() and rsm_intr_signal_wait() functions can
return the following error:

RSMERR_BAD_SEG_HNDL
Invalid segment handle.


The rsm_intr_signal_post() function can return the following error:

RSMERR_CONN_ABORTED

Connection aborted.


RSMERR_REMOTE_NODE_UNREACHABLE

Remote node not reachable.


The rsm_intr_signal_wait() function can return the following errors:

RSMERR_INTERRUPTED
Wait interrupted.


RSMERR_TIMEOUT
Timer expired.


ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Evolving |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+

SEE ALSO


rsm_memseg_get_pollfd(3RSM), attributes(5)


November 26, 2017 RSM_INTR_SIGNAL_POST(3RSM)