1 files changed, 125 insertions, 0 deletions
diff --git a/media/webrtc/signaling/src/common/time_profiling/timecard.c b/media/webrtc/signaling/src/common/time_profiling/timecard.c
new file mode 100644
index 000000000..e56377534
--- /dev/null
+++ b/media/webrtc/signaling/src/common/time_profiling/timecard.c
@@ -0,0 +1,125 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <stdio.h>
+#include "timecard.h"
+#include "mozilla/mozalloc.h"
+
+Timecard *
+create_timecard()
+{
+  Timecard *tc = moz_xcalloc(1,sizeof(Timecard));
+  tc->entries_allocated = TIMECARD_INITIAL_TABLE_SIZE;
+  tc->entries = moz_xcalloc(tc->entries_allocated, sizeof(TimecardEntry));
+  tc->start_time = PR_Now();
+  return tc;
+}
+
+void
+destroy_timecard(Timecard *tc)
+{
+  free(tc->entries);
+  free(tc);
+}
+
+void
+stamp_timecard(Timecard *tc,
+               const char *event,
+               const char *file,
+               unsigned int line,
+               const char *function)
+{
+  TimecardEntry *entry = NULL;
+
+  /* Trim the path component from the filename */
+  const char *last_slash = file;
+  while (*file) {
+    if (*file == '/' || *file == '\\') {
+      last_slash = file;
+    }
+    file++;
+  }
+  file = last_slash;
+  if (*file == '/' || *file == '\\') {
+    file++;
+  }
+
+  /* Ensure there is enough space left in the entries list */
+  if (tc->curr_entry == tc->entries_allocated) {
+    tc->entries_allocated *= 2;
+    tc->entries = moz_xrealloc(tc->entries,
+                               tc->entries_allocated * sizeof(TimecardEntry));
+  }
+
+  /* Record the data into the timecard entry */
+  entry = &tc->entries[tc->curr_entry];
+  entry->timestamp = PR_Now();
+  entry->event = event;
+  entry->file = file;
+  entry->line = line;
+  entry->function = function;
+  tc->curr_entry++;
+}
+
+void
+print_timecard(Timecard *tc)
+{
+  size_t i;
+  TimecardEntry *entry;
+  size_t event_width = 5;
+  size_t file_width = 4;
+  size_t function_width = 8;
+  size_t line_width;
+  PRTime offset, delta;
+
+  for (i = 0; i < tc->curr_entry; i++) {
+    entry = &tc->entries[i];
+    if (strlen(entry->event) > event_width) {
+      event_width = strlen(entry->event);
+    }
+    if (strlen(entry->file) > file_width) {
+      file_width = strlen(entry->file);
+    }
+    if (strlen(entry->function) > function_width) {
+      function_width = strlen(entry->function);
+    }
+  }
+
+  printf("\nTimecard created %4ld.%6.6ld\n\n",
+          (long)(tc->start_time / PR_USEC_PER_SEC),
+          (long)(tc->start_time % PR_USEC_PER_SEC));
+
+  line_width = 1 + 11 + 11 + event_width + file_width + 6 +
+                   function_width + (4 * 3);
+
+  printf(" %-11s | %-11s | %-*s | %-*s | %-*s\n",
+          "Timestamp", "Delta",
+          (int)event_width, "Event",
+          (int)file_width + 6, "File",
+          (int)function_width, "Function");
+
+  for (i = 0; i <= line_width; i++) {
+    printf("=");
+  }
+  printf("\n");
+
+  for (i = 0; i < tc->curr_entry; i++) {
+    entry = &tc->entries[i];
+    offset = entry->timestamp - tc->start_time;
+    if (i > 0) {
+      delta = entry->timestamp - tc->entries[i-1].timestamp;
+    } else {
+      delta = entry->timestamp - tc->start_time;
+    }
+    printf(" %4ld.%6.6ld | %4ld.%6.6ld | %-*s | %*s:%-5d | %-*s\n",
+           (long)(offset / PR_USEC_PER_SEC), (long)(offset % PR_USEC_PER_SEC),
+           (long)(delta / PR_USEC_PER_SEC), (long)(delta % PR_USEC_PER_SEC),
+           (int)event_width, entry->event,
+           (int)file_width, entry->file, entry->line,
+           (int)function_width, entry->function);
+  }
+  printf("\n");
+}