lib: Cancel tpm threads instead of marking exit

This makes the threadpool use pthread_cancel instead of setting an
exit flag that threadpool managed threads check periodically. This
drastically reduces CPU consumption in the irmd when running a lot of
applications. It requires cancellation handlers in the ipcp and irmd
to be implemented to ensure safe cancellation during operation and
shutdown.

1 files changed, 6 insertions, 4 deletions

diff --git a/src/irmd/api_table.h b/src/irmd/api_table.h
index d2ac7723..1fb2e285 100644
--- a/src/irmd/api_table.h
+++ b/src/irmd/api_table.h
@@ -23,6 +23,7 @@
 #ifndef OUROBOROS_IRMD_API_TABLE_H
 #define OUROBOROS_IRMD_API_TABLE_H
 
+#include "time.h"
 #include "utils.h"
 
 #include <unistd.h>
@@ -45,10 +46,10 @@ struct api_entry {
 
         struct reg_entry * re;       /* reg_entry for which a flow arrived */
 
-        /* the api will block on this */
+        /* The process will block on this */
         enum api_state     state;
-        pthread_cond_t     state_cond;
-        pthread_mutex_t    state_lock;
+        pthread_cond_t     cond;
+        pthread_mutex_t    lock;
 };
 
 struct api_entry * api_entry_create(pid_t  api,
@@ -56,7 +57,8 @@ struct api_entry * api_entry_create(pid_t  api,
 
 void               api_entry_destroy(struct api_entry * e);
 
-int                api_entry_sleep(struct api_entry * e);
+int                api_entry_sleep(struct api_entry * e,
+                                   struct timespec *  timeo);
 
 void               api_entry_wake(struct api_entry * e,
                                   struct reg_entry * re);