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src/libcfa/concurrency/monitor.c
rb8116cd rd67cdb7 94 94 } 95 95 else if( this->owner == thrd) { 96 // We already have the monitor, just not ehow many times we took it96 // We already have the monitor, just not how many times we took it 97 97 verify( this->recursion > 0 ); 98 98 this->recursion += 1; … … 127 127 unlock( &this->lock ); 128 128 return; 129 }130 131 static void __enter_monitor_dtor( monitor_desc * this, fptr_t func ) {132 // Lock the monitor spinlock, lock_yield to reduce contention133 lock_yield( &this->lock DEBUG_CTX2 );134 thread_desc * thrd = this_thread;135 136 LIB_DEBUG_PRINT_SAFE("Kernel : %10p Entering dtor for mon %p (%p)\n", thrd, this, this->owner);137 138 139 if( !this->owner ) {140 LIB_DEBUG_PRINT_SAFE("Kernel : Destroying free mon %p\n", this);141 142 // No one has the monitor, just take it143 set_owner( this, thrd );144 145 unlock( &this->lock );146 return;147 }148 else if( this->owner == thrd) {149 // We already have the monitor... but where about to destroy it so the nesting will fail150 // Abort!151 abortf("Attempt to destroy monitor %p by thread \"%.256s\" (%p) in nested mutex.");152 }153 154 int count = 1;155 monitor_desc ** monitors = &this;156 __monitor_group_t group = { &this, 1, func };157 if( is_accepted( this, group) ) {158 LIB_DEBUG_PRINT_SAFE("Kernel : mon accepts dtor, block and signal it \n");159 160 // Wake the thread that is waiting for this161 __condition_criterion_t * urgent = pop( &this->signal_stack );162 verify( urgent );163 164 // Reset mask165 reset_mask( this );166 167 // Create the node specific to this wait operation168 wait_ctx_primed( this_thread, 0 )169 170 // Some one else has the monitor, wait for him to finish and then run171 BlockInternal( &this->lock, urgent->owner->waiting_thread );172 173 // Some one was waiting for us, enter174 set_owner( this, thrd );175 }176 else {177 LIB_DEBUG_PRINT_SAFE("Kernel : blocking \n");178 179 wait_ctx( this_thread, 0 )180 this->dtor_node = &waiter;181 182 // Some one else has the monitor, wait in line for it183 append( &this->entry_queue, thrd );184 BlockInternal( &this->lock );185 186 // BlockInternal will unlock spinlock, no need to unlock ourselves187 return;188 }189 190 LIB_DEBUG_PRINT_SAFE("Kernel : Destroying %p\n", this);191 192 129 } 193 130 … … 221 158 } 222 159 223 // Leave single monitor for the last time224 void __leave_dtor_monitor_desc( monitor_desc * this ) {225 LIB_DEBUG_DO(226 if( this_thread != this->owner ) {227 abortf("Destroyed monitor %p has inconsistent owner, expected %p got %p.\n", this, this_thread, this->owner);228 }229 if( this->recursion != 1 ) {230 abortf("Destroyed monitor %p has %d outstanding nested calls.\n", this, this->recursion - 1);231 }232 )233 }234 235 160 // Leave the thread monitor 236 161 // last routine called by a thread. … … 285 210 // Ctor for monitor guard 286 211 // Sorts monitors before entering 287 void ?{}( monitor_guard_t & this, monitor_desc ** m, int count, fptr_t func) {212 void ?{}( monitor_guard_t & this, monitor_desc ** m, int count, void (*func)() ) { 288 213 // Store current array 289 214 this.m = m; … … 321 246 322 247 // LIB_DEBUG_PRINT_SAFE("MGUARD : left\n"); 323 324 // Restore thread context325 this_thread->monitors.list = this.prev_mntrs;326 this_thread->monitors.size = this.prev_count;327 this_thread->monitors.func = this.prev_func;328 }329 330 331 // Ctor for monitor guard332 // Sorts monitors before entering333 void ?{}( monitor_dtor_guard_t & this, monitor_desc ** m, fptr_t func ) {334 // Store current array335 this.m = *m;336 337 // Save previous thread context338 this.prev_mntrs = this_thread->monitors.list;339 this.prev_count = this_thread->monitors.size;340 this.prev_func = this_thread->monitors.func;341 342 // Update thread context (needed for conditions)343 this_thread->monitors.list = m;344 this_thread->monitors.size = 1;345 this_thread->monitors.func = func;346 347 __enter_monitor_dtor( this.m, func );348 }349 350 351 // Dtor for monitor guard352 void ^?{}( monitor_dtor_guard_t & this ) {353 // Leave the monitors in order354 __leave_dtor_monitor_desc( this.m );355 248 356 249 // Restore thread context … … 555 448 *mask.accepted = index; 556 449 if( mask.clauses[index].is_dtor ) { 557 LIB_DEBUG_PRINT_SAFE("Kernel : dtor already there\n"); 558 verifyf( mask.clauses[index].size == 1 , "ERROR: Accepted dtor has more than 1 mutex parameter." ); 559 560 monitor_desc * mon2dtor = mask.clauses[index].list[0]; 561 verifyf( mon2dtor->dtor_node, "ERROR: Accepted monitor has no dtor_node." ); 562 563 __condition_criterion_t * dtor_crit = mon2dtor->dtor_node->criteria; 564 push( &mon2dtor->signal_stack, dtor_crit ); 565 566 unlock_all( locks, count ); 450 #warning case not implemented 567 451 } 568 452 else {
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