Changeset b21c77a for src/libcfa/concurrency/preemption.c

Timestamp:

Jun 29, 2018, 4:14:15 PM (7 years ago)

Author:

Aaron Moss <a3moss@…>

Branches:

new-env

Children:

184557e

Parents:

97397a26 (diff), 28f3a19 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge remote-tracking branch 'origin/with_gc' into new-env

File:

• src/libcfa/concurrency/preemption.c (modified) (9 diffs)

src/libcfa/concurrency/preemption.c

@@ -10 +10 @@
 // Created On       : Mon Jun 5 14:20:42 2017
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Mon Apr  9 13:52:39 2018
-// Update Count     : 36
+// Last Modified On : Tue Jun  5 17:35:49 2018
+// Update Count     : 37
 //
 
@@ -116 +116 @@
         // If there are still alarms pending, reset the timer
         if( alarms->head ) {
-                __cfaabi_dbg_print_buffer_decl( " KERNEL: @%lu(%lu) resetting alarm to %lu.\n", currtime.tv, __kernel_get_time().tv, (alarms->head->alarm - currtime).tv);
+                __cfaabi_dbg_print_buffer_decl( " KERNEL: @%ju(%ju) resetting alarm to %ju.\n", currtime.tv, __kernel_get_time().tv, (alarms->head->alarm - currtime).tv);
                 Duration delta = alarms->head->alarm - currtime;
                 Duration caped = max(delta, 50`us);
@@ -161 +161 @@
         void disable_interrupts() {
                 with( kernelTLS.preemption_state ) {
+                        #if GCC_VERSION > 50000
                         static_assert(__atomic_always_lock_free(sizeof(enabled), &enabled), "Must be lock-free");
+                        #endif
 
                         // Set enabled flag to false
@@ -190 +192 @@
                         // Check if we need to prempt the thread because an interrupt was missed
                         if( prev == 1 ) {
+                                #if GCC_VERSION > 50000
                                 static_assert(__atomic_always_lock_free(sizeof(enabled), &enabled), "Must be lock-free");
+                                #endif
 
                                 // Set enabled flag to true
@@ -217 +221 @@
                 verifyf( prev != 0u, "Incremented from %u\n", prev );                     // If this triggers someone is enabled already enabled interrupts
                 if( prev == 1 ) {
+                        #if GCC_VERSION > 50000
                         static_assert(__atomic_always_lock_free(sizeof(kernelTLS.preemption_state.enabled), &kernelTLS.preemption_state.enabled), "Must be lock-free");
+                        #endif
                         // Set enabled flag to true
                         // should be atomic to avoid preemption in the middle of the operation.
@@ -254 +260 @@
 static void preempt( processor * this ) {
         sigval_t value = { PREEMPT_NORMAL };
-        pthread_sigqueue( this->kernel_thread, SIGUSR1, value );
-}
-
-// kill wrapper : signal a processor
-void terminate(processor * this) {
-        this->do_terminate = true;
-        sigval_t value = { PREEMPT_TERMINATE };
         pthread_sigqueue( this->kernel_thread, SIGUSR1, value );
 }
@@ -362 +361 @@
         choose(sfp->si_value.sival_int) {
                 case PREEMPT_NORMAL   : ;// Normal case, nothing to do here
-                case PREEMPT_TERMINATE: verify( kernelTLS.this_processor->do_terminate);
+                case PREEMPT_TERMINATE: verify( __atomic_load_n( &kernelTLS.this_processor->do_terminate, __ATOMIC_SEQ_CST ) );
                 default:
                         abort( "internal error, signal value is %d", sfp->si_value.sival_int );
@@ -376 +375 @@
 
         // Clear sighandler mask before context switching.
+        #if GCC_VERSION > 50000
         static_assert( sizeof( sigset_t ) == sizeof( cxt->uc_sigmask ), "Expected cxt->uc_sigmask to be of sigset_t" );
+        #endif
         if ( pthread_sigmask( SIG_SETMASK, (sigset_t *)&(cxt->uc_sigmask), NULL ) == -1 ) {
                 abort( "internal error, sigprocmask" );
@@ -479 +480 @@
 }
 
+#ifdef __CFA_WITH_VERIFY__
+bool __cfaabi_dbg_in_kernel() {
+        return !kernelTLS.preemption_state.enabled;
+}
+#endif
+
 // Local Variables: //
 // mode: c //