From owner-cvs-all  Sun Aug  2 10:04:27 1998
Return-Path: <owner-cvs-all>
Received: (from daemon@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id KAA27796
          for cvs-all-outgoing; Sun, 2 Aug 1998 10:04:27 -0700 (PDT)
          (envelope-from owner-cvs-all)
Received: from freefall.freebsd.org (freefall.FreeBSD.ORG [204.216.27.21])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA27791;
          Sun, 2 Aug 1998 10:04:26 -0700 (PDT)
          (envelope-from alex@FreeBSD.org)
From: Alex Nash <alex@FreeBSD.ORG>
Received: (from alex@localhost)
	by freefall.freebsd.org (8.8.8/8.8.5) id KAA02593;
	Sun, 2 Aug 1998 10:04:26 -0700 (PDT)
Date: Sun, 2 Aug 1998 10:04:26 -0700 (PDT)
Message-Id: <199808021704.KAA02593@freefall.freebsd.org>
To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject: cvs commit: src/lib/libc_r/uthread uthread_mutex.c
Sender: owner-cvs-all@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

alex        1998/08/02 10:04:25 PDT

  Modified files:
    lib/libc_r/uthread   uthread_mutex.c 
  Log:
  Fixed a race condition during the first lock/trylock of a statically
  initialized mutex.  Statically initialized mutexes are actually
  initialized at first use (pthread_mutex_lock/pthread_mutex_trylock).
  To prevent concurrent initialization by multiple threads, all
  static initializations are now serialized by a spinlock.
  
  Reviewed by:	jb
  
  Revision  Changes    Path
  1.8       +21 -4     src/lib/libc_r/uthread/uthread_mutex.c