rwmtx_rdlock(3)		   Library Functions Manual	       rwmtx_rdlock(3)

NAME
     rwmtx_rdlock – acquire a read lock

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

     int
     rwmtx_rdlock(rwmtx_t *rw);

DESCRIPTION
     The function rwmtx_rdlock() will acquire a read lock on the given
     read/write lock rw.  If a write lock is acquired on the lock, the thread
     will be stalled until the read lock can be acquired.

     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_rdlock() will return thrd_success.  In case of error
     thrd_error will be returned.

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

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

AUTHORS
     Jan Adelsbach <jan@jadelsbach.de>

Linux 6.13.6-1-default		  May 9, 2020		Linux 6.13.6-1-default