Add proper per-file copyright notices/licenses and top-level license.

[bluesky.git] / bluesky / util.c

diff --git a/bluesky/util.c b/bluesky/util.c
index 90eda70..5412963 100644 (file)
--- a/bluesky/util.c
+++ b/bluesky/util.c
@@ -3,14 +3,40 @@
  * Copyright (C) 2009  The Regents of the University of California
  * Written by Michael Vrable <mvrable@cs.ucsd.edu>
  *
- * TODO: Licensing
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
  */
 
+#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdint.h>
 #include <glib.h>
 #include <string.h>
+#include <unistd.h>
 #include <sys/mman.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
 
 #include "bluesky-private.h"
 
@@ -79,6 +105,7 @@ BlueSkyRCStr *bluesky_string_new_from_mmap(BlueSkyCacheFile *mmap,
                                            int offset, gsize len)
 {
     g_assert(offset + len <= mmap->len);
+    g_assert(mmap->addr != NULL);
 
     BlueSkyRCStr *string = g_new(BlueSkyRCStr, 1);
     string->mmap = mmap;
@@ -340,51 +367,97 @@ void bluesky_rangeset_get_extents(BlueSkyRangeset *rangeset,
 /**** Request response-time tracking. ****/
 /* TODO: Locking */
 typedef struct {
+    int tid;
     bluesky_time_hires timestamp;
     char *message;
 } RTEvent;
 
+/* To catch attempts to access to invalid profile structures. */
+#define PROFILE_MAGIC 0x439929d8
+
+static FILE *profiling_file = NULL;
+
 BlueSkyProfile *bluesky_profile_new()
 {
-    return g_new0(BlueSkyProfile, 1);
+    BlueSkyProfile *profile = g_new0(BlueSkyProfile, 1);
+    profile->lock = g_mutex_new();
+    profile->magic = PROFILE_MAGIC;
+    return profile;
 }
 
 void bluesky_profile_free(BlueSkyProfile *profile)
 {
+    if (profile->magic != PROFILE_MAGIC) {
+        g_warning("Access to invalid BlueSkyProfile object!");
+        return;
+    }
     while (profile->events != NULL) {
         RTEvent *event = (RTEvent *)profile->events->data;
         g_free(event->message);
         g_free(event);
         profile->events = g_list_delete_link(profile->events, profile->events);
     }
+    profile->magic = 0;
+    g_mutex_free(profile->lock);
     g_free(profile->description);
     g_free(profile);
 }
 
 void bluesky_profile_add_event(BlueSkyProfile *profile, char *message)
 {
+    if (profiling_file == NULL)
+        return;
+
     g_return_if_fail(profile != NULL);
 
+    if (profile->magic != PROFILE_MAGIC) {
+        g_warning("Access to invalid BlueSkyProfile object!");
+        return;
+    }
+    g_mutex_lock(profile->lock);
     RTEvent *event = g_new(RTEvent, 1);
     event->timestamp = bluesky_now_hires();
+    /* FIXME: Non-portable */
+    event->tid = syscall(SYS_gettid);
     event->message = message;
     profile->events = g_list_prepend(profile->events, event);
+    g_mutex_unlock(profile->lock);
+}
+
+static GStaticMutex profiling_print_lock = G_STATIC_MUTEX_INIT;
+
+void bluesky_profile_set_output(FILE *stream)
+{
+    profiling_file = stream;
 }
 
 void bluesky_profile_print(BlueSkyProfile *profile)
 {
+    FILE *stream = profiling_file;
+    if (stream == NULL)
+        return;
+
     g_return_if_fail(profile != NULL);
 
-    g_print("Event Timeline: %s\n", profile->description);
+    if (profile->magic != PROFILE_MAGIC) {
+        g_warning("Access to invalid BlueSkyProfile object!");
+        return;
+    }
+
+    g_mutex_lock(profile->lock);
+    g_static_mutex_lock(&profiling_print_lock);
+    fprintf(stream, "Event Timeline: %s\n", profile->description);
     GList *link = g_list_last(profile->events);
     bluesky_time_hires last_time = 0;
     while (link != NULL) {
         RTEvent *event = (RTEvent *)link->data;
-        g_print("  [%"PRIi64" ns]: %s\n",
-                event->timestamp - last_time, event->message);
+        fprintf(stream, "  [%d] [%"PRIi64" ns]: %s\n",
+                event->tid, event->timestamp - last_time, event->message);
         last_time = event->timestamp;
         link = link->prev;
     }
+    g_static_mutex_unlock(&profiling_print_lock);
+    g_mutex_unlock(profile->lock);
 }
 
 static GStaticPrivate per_thread_profile = G_STATIC_PRIVATE_INIT;