Changes between Version 2 and Version 3 of user_synchro

Timestamp:

Oct 9, 2018, 12:54:19 PM (6 years ago)

Author:

alain

Comment:

--

user_synchro

@@ -5 +5 @@
 == A) General Principles ==
 
-All data structure defined by  ALMOS-MKH to support the user-level, POSIX compliant, synchronization services are fully specific, and do NOT use the kernel level synchronization primitives described in section. does NOT use the  
+All data structure defined by  ALMOS-MKH to support the user-level, POSIX compliant, synchronization services are fully specific, and do NOT use the kernel level synchronization primitives described in section J. 
+ * A '''mutex''' is declared by a given user process as a ''pthread_mutex_t'' global variable. 
+ * A '''condvar'''  is declared by a given user process as a ''pthread_cond_t'' global variable. 
+ * A '''barrier'''  is declared by a given user process as a ''pthread_barrier_t'' global variable. 
+ * A '''semaphore''' is declared by a given user process as a ''sem_t'' global variable. 
+All these user types are implemented by ALMOS-MKH as ''unsigned long'', but the value stored in user space is NOT used by the kernel. ALMOS-MKH uses only the virtual address as an identifier for a given synchronization variable.
+For each type of variable, ALMOS-MKH defines a specific internal data structure described below.
 
 == B) Mutex ==
@@ -12 +18 @@
 
 It can be used by muti-threaded user applications to synchronise user threads running in different clusters.
-
-A mutex is declared by a given user process as a ''pthread_mutex_t'' global variable. This user type is implemented by ALMOS-MKH as an ''unsigned long'', but the value stored in user space is NOT used by the kernel. ALMOS-MKH uses only the mutex virtual address as an identifier for the mutex.
 
 The kernel implementation of a mutex is defined in the [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/libk/remote_mutex.h remote_mutex.h] and [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/libk/remote_mutex.c remote_mutex.c] files.
@@ -22 +26 @@
 == C) Condvar ==
 
+The user level, POSIX compliant, condvar API is defined in the '''pthread''' library implemented by the [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/libs/libpthread/pthread.h pthread.h] and [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/libs/libpthread/pthread.c pthread.c] files.
+
 == D) Semaphore ==