From owner-svn-src-all@FreeBSD.ORG Wed Jan 13 18:12:22 2010 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 427671065672; Wed, 13 Jan 2010 18:12:22 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 311598FC17; Wed, 13 Jan 2010 18:12:22 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o0DICM93083392; Wed, 13 Jan 2010 18:12:22 GMT (envelope-from jhb@svn.freebsd.org) Received: (from jhb@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id o0DICMhH083390; Wed, 13 Jan 2010 18:12:22 GMT (envelope-from jhb@svn.freebsd.org) Message-Id: <201001131812.o0DICMhH083390@svn.freebsd.org> From: John Baldwin Date: Wed, 13 Jan 2010 18:12:22 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org X-SVN-Group: stable-8 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r202201 - stable/8/lib/libc/stdtime X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Jan 2010 18:12:22 -0000 Author: jhb Date: Wed Jan 13 18:12:21 2010 New Revision: 202201 URL: http://svn.freebsd.org/changeset/base/202201 Log: MFC 199607, 200797, 201270, 201669: Use pthread_once() to initialize the thread-local storage for localtime() and gmtime() and _once() to initialize gmt state rather than home-rolled versions using pthread mutex locks. Modified: stable/8/lib/libc/stdtime/localtime.c Directory Properties: stable/8/lib/libc/ (props changed) stable/8/lib/libc/stdtime/ (props changed) Modified: stable/8/lib/libc/stdtime/localtime.c ============================================================================== --- stable/8/lib/libc/stdtime/localtime.c Wed Jan 13 18:09:54 2010 (r202200) +++ stable/8/lib/libc/stdtime/localtime.c Wed Jan 13 18:12:21 2010 (r202201) @@ -235,9 +235,14 @@ static struct state gmtmem; static char lcl_TZname[TZ_STRLEN_MAX + 1]; static int lcl_is_set; -static int gmt_is_set; +static pthread_once_t gmt_once = PTHREAD_ONCE_INIT; static pthread_rwlock_t lcl_rwlock = PTHREAD_RWLOCK_INITIALIZER; -static pthread_mutex_t gmt_mutex = PTHREAD_MUTEX_INITIALIZER; +static pthread_once_t gmtime_once = PTHREAD_ONCE_INIT; +static pthread_key_t gmtime_key; +static int gmtime_key_error; +static pthread_once_t localtime_once = PTHREAD_ONCE_INIT; +static pthread_key_t localtime_key; +static int localtime_key_error; char * tzname[2] = { wildabbr, @@ -1407,27 +1412,24 @@ struct tm * const tmp; return result; } +static void +localtime_key_init(void) +{ + + localtime_key_error = _pthread_key_create(&localtime_key, free); +} + struct tm * localtime(timep) const time_t * const timep; { - static pthread_mutex_t localtime_mutex = PTHREAD_MUTEX_INITIALIZER; - static pthread_key_t localtime_key = -1; struct tm *p_tm; - int r; if (__isthreaded != 0) { - if (localtime_key < 0) { - _pthread_mutex_lock(&localtime_mutex); - if (localtime_key < 0) { - if ((r = _pthread_key_create(&localtime_key, - free)) != 0) { - _pthread_mutex_unlock(&localtime_mutex); - errno = r; - return(NULL); - } - } - _pthread_mutex_unlock(&localtime_mutex); + _pthread_once(&localtime_once, localtime_key_init); + if (localtime_key_error != 0) { + errno = localtime_key_error; + return(NULL); } p_tm = _pthread_getspecific(localtime_key); if (p_tm == NULL) { @@ -1464,6 +1466,17 @@ struct tm * tmp; return tmp; } +static void +gmt_init(void) +{ + +#ifdef ALL_STATE + gmtptr = (struct state *) malloc(sizeof *gmtptr); + if (gmtptr != NULL) +#endif /* defined ALL_STATE */ + gmtload(gmtptr); +} + /* ** gmtsub is to gmtime as localsub is to localtime. */ @@ -1476,16 +1489,7 @@ struct tm * const tmp; { register struct tm * result; - _MUTEX_LOCK(&gmt_mutex); - if (!gmt_is_set) { -#ifdef ALL_STATE - gmtptr = (struct state *) malloc(sizeof *gmtptr); - if (gmtptr != NULL) -#endif /* defined ALL_STATE */ - gmtload(gmtptr); - gmt_is_set = TRUE; - } - _MUTEX_UNLOCK(&gmt_mutex); + _once(&gmt_once, gmt_init); result = timesub(timep, offset, gmtptr, tmp); #ifdef TM_ZONE /* @@ -1509,27 +1513,24 @@ struct tm * const tmp; return result; } +static void +gmtime_key_init(void) +{ + + gmtime_key_error = _pthread_key_create(&gmtime_key, free); +} + struct tm * gmtime(timep) const time_t * const timep; { - static pthread_mutex_t gmtime_mutex = PTHREAD_MUTEX_INITIALIZER; - static pthread_key_t gmtime_key = -1; struct tm *p_tm; - int r; if (__isthreaded != 0) { - if (gmtime_key < 0) { - _pthread_mutex_lock(&gmtime_mutex); - if (gmtime_key < 0) { - if ((r = _pthread_key_create(&gmtime_key, - free)) != 0) { - _pthread_mutex_unlock(&gmtime_mutex); - errno = r; - return(NULL); - } - } - _pthread_mutex_unlock(&gmtime_mutex); + _pthread_once(&gmtime_once, gmtime_key_init); + if (gmtime_key_error != 0) { + errno = gmtime_key_error; + return(NULL); } /* * Changed to follow POSIX.1 threads standard, which