Changeset 454:f1484823cb4a in freeDiameter for include

Timestamp:

Jul 29, 2010, 4:11:12 PM (14 years ago)

Author:

Sebastien Decugis <sdecugis@nict.go.jp>

Branch:

default

Phase:

public

Message:

Small hack which might spear some concurrency problems and is quite harmless

Location:

include/freeDiameter

Files:

• freeDiameter.h (modified) (2 diffs)
• libfreeDiameter.h (modified) (1 diff)

include/freeDiameter/freeDiameter.h

@@ -228 +228 @@
         struct {
                 
-                enum peer_state pir_state;      /* Current state of the peer in the state machine */
+                enum peer_state pir_state;      /* Current state of the peer in the state machine. fd_cpu_flush_cache() might be useful before reading. */
                 
                 char *          pir_realm;      /* The received realm in CER/CEA. */
@@ -252 +252 @@
         struct fd_list  pi_endpoints;   /* Endpoint(s) of the remote peer (configured, discovered, or advertized). list of struct fd_endpoint. DNS resolved if empty. */
 };
+
 
 struct peer_hdr {

include/freeDiameter/libfreeDiameter.h

@@ -569 +569 @@
 }
 
+/* Force flushing the cache of a CPU before reading a shared memory area (use only for atomic reads such as int and void*) */
+extern pthread_mutex_t fd_cpu_mtx_dummy; /* only for the macro bellow, so that we have reasonably fresh pir_state value when needed */
+#define fd_cpu_flush_cache() {                          \
+        (void)pthread_mutex_lock(&fd_cpu_mtx_dummy);    \
+        (void)pthread_mutex_unlock(&fd_cpu_mtx_dummy);  \
+}
+
+
 /*************
  Cancelation cleanup handlers for common objects