likely/unlikely branch prediction

[lttv.git] / ltt / branches / poly / lttv / lttv / attribute.c

diff --git a/ltt/branches/poly/lttv/lttv/attribute.c b/ltt/branches/poly/lttv/lttv/attribute.c
index 0eef75b80474263f1baa9e9fa0d6c5be2eeba13d..57f4330fc804374a778c0c55dbbfc92097e3a7f7 100644 (file)
--- a/ltt/branches/poly/lttv/lttv/attribute.c
+++ b/ltt/branches/poly/lttv/lttv/attribute.c
@@ -16,8 +16,10 @@
  * MA 02111-1307, USA.
  */
 
+#include <string.h>
 #include <lttv/attribute.h>
 #include <ltt/ltt.h>
+#include <ltt/compiler.h>
 
 typedef union _AttributeValue {
   int dv_int;
@@ -40,7 +42,8 @@ typedef struct _Attribute {
 } Attribute;
 
 
-LttvAttributeValue address_of_value(LttvAttributeType t, AttributeValue *v)
+static __inline__ LttvAttributeValue address_of_value(LttvAttributeType t,
+                                                      AttributeValue *v)
 {
   LttvAttributeValue va;
 
@@ -55,6 +58,7 @@ LttvAttributeValue address_of_value(LttvAttributeType t, AttributeValue *v)
   case LTTV_POINTER: va.v_pointer = &v->dv_pointer; break;
   case LTTV_STRING: va.v_string = &v->dv_string; break;
   case LTTV_GOBJECT: va.v_gobject = &v->dv_gobject; break;
+  case LTTV_NONE: break;
   }
   return va;
 }
@@ -75,6 +79,7 @@ AttributeValue init_value(LttvAttributeType t)
   case LTTV_POINTER: v.dv_pointer = NULL; break;
   case LTTV_STRING: v.dv_string = NULL; break;
   case LTTV_GOBJECT: v.dv_gobject = NULL; break;
+  case LTTV_NONE: break;
   }
   return v;
 }
@@ -173,7 +178,7 @@ lttv_attribute_remove(LttvAttribute *self, unsigned i)
   /* The element used to replace the removed element has its index entry
      all wrong now. Reinsert it with its new position. */
 
-  if(self->attributes->len != i){
+  if(likely(self->attributes->len != i)){
     g_hash_table_remove(self->names, GUINT_TO_POINTER(a->name));
     g_hash_table_insert(self->names, GUINT_TO_POINTER(a->name), GUINT_TO_POINTER(i + 1));
   }
@@ -185,7 +190,7 @@ lttv_attribute_remove_by_name(LttvAttribute *self, LttvAttributeName name)
   unsigned i;
 
   i = (unsigned)g_hash_table_lookup(self->names, GUINT_TO_POINTER(name));
-  if(i == 0) g_error("remove by name non existent attribute");
+  if(unlikely(i == 0)) g_error("remove by name non existent attribute");
 
   lttv_attribute_remove(self, i - 1);
 }
@@ -205,9 +210,9 @@ lttv_attribute_find_subdir(LttvAttribute *self, LttvAttributeName name)
   LttvAttribute *new;
   
   i = (unsigned)g_hash_table_lookup(self->names, GUINT_TO_POINTER(name));
-  if(i != 0) {
+  if(likely(i != 0)) {
     a = g_array_index(self->attributes, Attribute, i - 1);
-    if(a.type == LTTV_GOBJECT && LTTV_IS_IATTRIBUTE(a.value.dv_gobject)) {
+    if(likely(a.type == LTTV_GOBJECT && LTTV_IS_IATTRIBUTE(a.value.dv_gobject))) {
       return LTTV_ATTRIBUTE(a.value.dv_gobject);
     }
     else return NULL;    
@@ -226,9 +231,9 @@ lttv_attribute_find(LttvAttribute *self, LttvAttributeName name,
   Attribute *a;
 
   i = (unsigned)g_hash_table_lookup(self->names, GUINT_TO_POINTER(name));
-  if(i != 0) {
+  if(likely(i != 0)) {
     a = &g_array_index(self->attributes, Attribute, i - 1);
-    if(a->type != t) return FALSE;
+    if(unlikely(a->type != t)) return FALSE;
     *v = address_of_value(t, &(a->value));
     return TRUE;
   }
@@ -360,7 +365,7 @@ lttv_attribute_write_xml(LttvAttribute *self, FILE *fp, int pos, int indent)
           fprintf(fp, "TYPE=DOUBLE VALUE=%f/>\n", a->value.dv_double);
           break;
         case LTTV_TIME:
-          fprintf(fp, "TYPE=TIME SEC=%u NSEC=%u/>\n", a->value.dv_time.tv_sec,
+          fprintf(fp, "TYPE=TIME SEC=%lu NSEC=%lu/>\n", a->value.dv_time.tv_sec,
               a->value.dv_time.tv_nsec);
           break;
         case LTTV_POINTER:
@@ -386,9 +391,7 @@ lttv_attribute_write_xml(LttvAttribute *self, FILE *fp, int pos, int indent)
 void 
 lttv_attribute_read_xml(LttvAttribute *self, FILE *fp)
 {
-  int i, nb, res;
-
-  Attribute *a;
+  int res;
 
   char buffer[256], type[10];
 
@@ -437,12 +440,12 @@ lttv_attribute_read_xml(LttvAttribute *self, FILE *fp)
     }
     else if(strcmp(type, "DOUBLE") == 0) {
       value = lttv_attribute_add(self, name, LTTV_DOUBLE);
-      res = fscanf(fp, " VALUE=%f/>", value.v_double);
+      res = fscanf(fp, " VALUE=%lf/>", value.v_double);
       g_assert(res == 1);
     }
     else if(strcmp(type, "TIME") == 0) {
       value = lttv_attribute_add(self, name, LTTV_TIME);
-      res = fscanf(fp, " SEC=%u NSEC=%u/>", &(value.v_time->tv_sec), 
+      res = fscanf(fp, " SEC=%lu NSEC=%lu/>", &(value.v_time->tv_sec), 
           &(value.v_time->tv_nsec));
       g_assert(res == 2);
     }
@@ -513,12 +516,12 @@ attribute_interface_init (gpointer g_iface, gpointer iface_data)
 
 }
 
-
 static void
 attribute_instance_init (GTypeInstance *instance, gpointer g_class)
 {
   LttvAttribute *self = (LttvAttribute *)instance;
-  self->names = g_hash_table_new(g_direct_hash, g_direct_equal);
+  self->names = g_hash_table_new(g_direct_hash,
+                                 g_direct_equal);
   self->attributes = g_array_new(FALSE, FALSE, sizeof(Attribute));
 }
 
@@ -560,7 +563,8 @@ lttv_attribute_get_type (void)
       NULL,   /* class_data */
       sizeof (LttvAttribute),
       0,      /* n_preallocs */
-      (GInstanceInitFunc) attribute_instance_init    /* instance_init */
+      (GInstanceInitFunc) attribute_instance_init,    /* instance_init */
+      NULL    /* value handling */
     };
 
     static const GInterfaceInfo iattribute_info = {