Try/catch scheme. Typed up the functionality and regression tested.

Ready for discussion and tiny patches that tries out this scheme.

git-svn-id: svn://svn.berlios.de/openocd/trunk@2755 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/helper/log.c b/src/helper/log.c
index 9bfe4d11c56f81c7c0fb9cc9bbf6c4aa59cb9cbb..f68c9a3ee4bc7ab925641f4cc882e27d27fea031 100644 (file)
--- a/src/helper/log.c
+++ b/src/helper/log.c
@@ -64,6 +64,95 @@ static char *log_strings[5] =
 
 static int count = 0;
 
+
+static struct store_log_forward * log_head = NULL;
+static int log_forward_count = 0;
+
+struct store_log_forward
+{
+       struct store_log_forward * next;
+       const char * file;
+       int line;
+       const char * function;
+       const char * string;
+};
+
+/* either forward the log to the listeners or store it for possible forwarding later */
+static void log_forward(const char *file, int line, const char *function, const char *string)
+{
+       if (log_forward_count==0)
+       {
+               log_callback_t *cb, *next;
+               cb = log_callbacks;
+               /* DANGER!!!! the log callback can remove itself!!!! */
+               while (cb)
+               {
+                       next = cb->next;
+                       cb->fn(cb->priv, file, line, function, string);
+                       cb = next;
+               }
+       } else
+       {
+               struct store_log_forward *log = malloc(sizeof (struct store_log_forward));
+               log->file = strdup(file);
+               log->line = line;
+               log->function = strdup(function);
+               log->string = strdup(string);
+               log->next = NULL;
+               if (log_head==NULL)
+                       log_head = log;
+               else
+               {
+                       /* append to tail */
+                       struct store_log_forward * t;
+                       t = log_head;
+                       while (t->next!=NULL)
+                       {
+                               t = t->next;
+                       }
+                       t->next = log;
+               }
+       }
+}
+
+void log_try(void)
+{
+       log_forward_count++;
+}
+
+void log_catch(void)
+{
+       assert(log_forward_count>0);
+       log_forward_count--;
+}
+
+void log_rethrow(void)
+{
+       log_catch();
+       if (log_forward_count==0)
+       {
+               struct store_log_forward *log;
+
+               log = log_head;
+               while (log != NULL)
+               {
+                       log_forward(log->file, log->line, log->function, log->string);
+
+                       struct store_log_forward *t=log;
+                       log = log->next;
+
+                       free((void *)t->file);
+                       free((void *)t->function);
+                       free((void *)t->string);
+                       free(t);
+
+               }
+
+               log_head = NULL;
+       }
+}
+
+
 /* The log_puts() serves to somewhat different goals:
  *
  * - logging
@@ -131,18 +220,11 @@ static void log_puts(enum log_levels level, const char *file, int line, const ch
        /* Never forward LOG_LVL_DEBUG, too verbose and they can be found in the log if need be */
        if (level <= LOG_LVL_INFO)
        {
-               log_callback_t *cb, *next;
-               cb = log_callbacks;
-               /* DANGER!!!! the log callback can remove itself!!!! */
-               while (cb)
-               {
-                       next = cb->next;
-                       cb->fn(cb->priv, file, line, function, string);
-                       cb = next;
-               }
+               log_forward(file, line, function, string);
        }
 }
 
+
 void log_printf(enum log_levels level, const char *file, int line, const char *function, const char *format, ...)
 {
        char *string;

diff --git a/src/helper/log.h b/src/helper/log.h
index c3be0747ad6d44c723cb9ae6e1af457705f505a3..7fc5a886e84bc3d8ee5464ecc2cf6f64f44520dd 100644 (file)
--- a/src/helper/log.h
+++ b/src/helper/log.h
@@ -64,6 +64,15 @@ extern void kept_alive(void);
 extern void alive_sleep(int ms);
 extern void busy_sleep(int ms);
 
+
+/* log entries can be paused and replayed roughly according to the try/catch/rethrow
+ * concepts in C++
+ */
+void log_try(void);
+void log_catch(void);
+void log_rethrow(void);
+
+
 typedef void (*log_callback_fn)(void *priv, const char *file, int line,
                const char *function, const char *string);