Changeset 563 for trunk/kernel/libk/remote_barrier.h

Timestamp:

Oct 4, 2018, 11:16:13 PM (6 years ago)

Author:

alain

Message:

Complete restructuration of kernel spinlocks.

File:

• trunk/kernel/libk/remote_barrier.h (modified) (6 diffs)

trunk/kernel/libk/remote_barrier.h

@@ -1 +1 @@
 /*
- * remote_barrier.h - Access a POSIX barrier.               
+ * remote_barrier.h - POSIX barrier definition.               
  * 
- * Author  Alain Greiner (2016)
+ * Author  Alain Greiner (2016,2017,2018)
  *
  * Copyright (c) UPMC Sorbonne Universites
@@ -27 +27 @@
 #include <kernel_config.h>
 #include <hal_kernel_types.h>
-#include <remote_spinlock.h>
+#include <remote_busylock.h>
 #include <xlist.h>
 
@@ -33 +33 @@
  *          This file defines a POSIX compliant barrier.
  *
- * It is used by multi-threaded applications to synchronise threads running in
- * different clusters, as all access functions uses hal_remote_lw() / hal_remote_sw()
- * portable remote access primitives.
+ * It is used by multi-threaded iuser applications to synchronise threads running in
+ * different clusters, as all access functions uses hal_remote_l32() / hal_remote_s32()
+ * remote access primitives.
  *
  * A barrier is declared by a given user process as a "pthread_barrier_t" global variable.
@@ -50 +50 @@
  * is blocked on the THREAD_BLOCKED_USERSYNC condition. The last arrived thread
  * unblocks all registtered waiting threads.
- *
- * Implementation note:
- * This barrier is also used by the kernel in the parallel kernel_init phase, as the 
- * remote_barrier() function does not require barrier initialisation, when the barrier
- * is statically allocated by the compiler in the kdata segment.
  * **************************************************************************************/
 
@@ -66 +61 @@
 typedef struct remote_barrier_s
 {
-    remote_spinlock_t  lock;          /*! lock protecting list of arrived threads       */
+    remote_busylock_t  lock;          /*! lock protecting xlist of arrived threads      */
     intptr_t           ident;         /*! virtual address in user space == identifier   */
     uint32_t           current;       /*! number of arrived threads                     */
@@ -75 +70 @@
 } 
 remote_barrier_t;
-
-/*****************************************************************************************
- * This function is directly used by the kernel in the kernel_init phase,
- * because it does not require barrier state initialisation.
- * It returns only when the <count> expected threads reach the barrier.
- *****************************************************************************************
- * @ barrier_xp  : extended pointer on barrier descriptor.
- * @ count       : number of expected threads.
- ****************************************************************************************/
-inline void remote_barrier( xptr_t   barrier_xp,  
-                            uint32_t count );