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120 lines
3 KiB
C
120 lines
3 KiB
C
/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
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/*
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* Copyright 2024 by Eric House (xwords@eehouse.org). All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "xwmutex.h"
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#ifdef DEBUG
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#define WAIT_ALL_SECS 3
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typedef struct _WaitState {
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const char* caller;
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XP_U16 waitSecs;
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} WaitState;
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static void*
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checkLockProc(void* closure)
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{
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WaitState* wsp = (WaitState*)closure;
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sleep( wsp->waitSecs );
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XP_LOGFF( "failed to get mutex in %d secs (caller: %s())",
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wsp->waitSecs, wsp->caller );
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XP_ASSERT(0);
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return NULL;
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}
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void
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mtx_lock_prv( MutexState* state, XP_U16 waitSecs, const char* caller )
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{
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// XP_LOGFF( "(caller=%s, waitSecs=%d)", caller, waitSecs );
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pthread_t waitThread;
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WaitState ws = {
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.waitSecs = 0 < waitSecs ? waitSecs : state->waitSecs,
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.caller = caller,
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};
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if ( 0 < waitSecs ) {
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(void)pthread_create( &waitThread, NULL, checkLockProc, &ws );
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}
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pthread_mutex_lock( &state->mutex );
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if ( 0 < waitSecs ) {
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(void)pthread_cancel(waitThread);
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}
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}
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void
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mtx_unlock_prv( MutexState* state, XP_U16 XP_UNUSED(waitSecs),
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const char* XP_UNUSED(caller) )
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{
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// XP_LOGFF( "(caller=%s, waitSecs=%d)", caller, waitSecs );
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pthread_mutex_unlock( &state->mutex );
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}
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#endif
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void
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mtx_init_prv( MutexState* mutex, XP_Bool recursive
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#ifdef DEBUG
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, XP_U16 waitSecs
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#endif
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)
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{
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pthread_mutexattr_t attr;
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#ifdef DEBUG
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int ret =
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#endif
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pthread_mutexattr_init(&attr);
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XP_ASSERT(0 == ret);
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if ( recursive ) {
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#ifdef DEBUG
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ret =
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#endif
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pthread_mutexattr_settype(&attr,
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PTHREAD_MUTEX_RECURSIVE);
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XP_ASSERT(0 == ret);
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}
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#ifdef DEBUG
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# ifdef WAIT_ALL_SECS
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if ( waitSecs < WAIT_ALL_SECS ) {
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waitSecs = WAIT_ALL_SECS;
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}
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# endif
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mutex->waitSecs = waitSecs;
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#endif
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pthread_mutex_init( &mutex->mutex, &attr );
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#ifdef DEBUG
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ret =
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#endif
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pthread_mutexattr_destroy(&attr);
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XP_ASSERT(0 == ret);
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/* #ifdef DEBUG */
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/* if ( recursive ) { */
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/* XP_LOGFF( "testing recursive call..." ); */
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/* WITH_MUTEX( mutex ); */
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/* WITH_MUTEX( mutex ); */
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/* END_WITH_MUTEX(); */
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/* END_WITH_MUTEX(); */
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/* } */
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/* #endif */
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}
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void
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mtx_destroy_prv( MutexState* mutex )
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{
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pthread_mutex_destroy( &mutex->mutex );
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}
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