rwmtx_tryrdlock(3)	   Library Functions Manual	    rwmtx_tryrdlock(3)

NAME
     rwmtx_tryrdlock – attempt to acquire a read lock

SYNOPSIS
     library “threads”
     #include <threadse.h>

     int
     rwmtx_tryrdlock(rwmtx_t *rw);

DESCRIPTION
     The function rwmtx_tryrdlock() will attempt to acquire a read lock on the
     given read/write lock rw.	If a read lock cannot be acquired the function
     will return a respective return code.

     A thread can hold multiple read locks at the same time, rwmtx_unlock(3)
     must be called for each acquired lock.

RETURN VALUES
     Upon success rwmtx_tryrdlock() will return thrd_success if a read lock
     has been acquired. If no read lock can be acquired at this time thrd_busy
     will be returned.	In case of error thrd_error will be returned.

SEE ALSO
     rwmtx_init(3) rwmtx_destroy(3) rwmtx_rdlock(3) rwmtx_wrlock(3)
     rwmtx_trywrlock(3) rwmtx_timedrdlock(3) rwmtx_timedwrlock(3)
     rwmtx_unlock(3)

HISTORY
     The rwmtx_tryrdlock() function first appeared in the Adelsbach Enhanced
     Threading Library.

AUTHORS
     Jan Adelsbach <jan@jadelsbach.de>

Debian				  May 9, 2020				Debian