gstreamer/gst/gsttrace.c

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/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <glib.h>
#include <gst/gsttrace.h>
__inline__ void read_tsc(guint64 *dst) {
__asm__ __volatile__
("rdtsc"
: "=a" (*(guint32 *)dst), "=d" (*(((guint32 *)dst) + 1))
:
: "eax", "edx");
}
void gst_trace_read_tsc(guint64 *dst) {
read_tsc(dst);
}
GstTrace *_gst_trace_default = NULL;
gint _gst_trace_on = 1;
GstTrace *gst_trace_new(guchar *filename,gint size) {
GstTrace *trace = g_malloc(sizeof(GstTrace));
g_return_val_if_fail(trace != NULL,NULL);
trace->filename = g_strdup(filename);
g_print("opening '%s'\n",trace->filename);
trace->fd = open(trace->filename,O_RDWR|O_CREAT|O_TRUNC,S_IRUSR|S_IWUSR);
perror("opening trace file");
g_return_val_if_fail(trace->fd > 0,NULL);
trace->buf = g_malloc(size * sizeof(GstTraceEntry));
g_return_val_if_fail(trace->buf != NULL,NULL);
trace->bufsize = size;
trace->bufoffset = 0;
return trace;
}
void gst_trace_destroy(GstTrace *trace) {
g_return_if_fail(trace != NULL);
g_return_if_fail(trace->buf != NULL);
if (gst_trace_get_remaining(trace) > 0)
gst_trace_flush(trace);
close(trace->fd);
g_free(trace->buf);
g_free(trace);
}
void gst_trace_flush(GstTrace *trace) {
if (!trace) {
trace = _gst_trace_default;
if (!trace ) return;
}
write(trace->fd,trace->buf,trace->bufoffset * sizeof(GstTraceEntry));
trace->bufoffset = 0;
}
void gst_trace_set_default(GstTrace *trace) {
g_return_if_fail(trace != NULL);
_gst_trace_default = trace;
}
void _gst_trace_add_entry(GstTrace *trace,guint32 seq,guint32 data,gchar *msg) {
GstTraceEntry *entry;
if (!trace) {
trace = _gst_trace_default;
if (!trace ) return;
}
entry = trace->buf + trace->bufoffset;
read_tsc(&(entry->timestamp));
entry->sequence = seq;
entry->data = data;
strncpy(entry->message,msg,112);
trace->bufoffset++;
gst_trace_flush(trace);
}