inital checkin of spandsp from http://www.soft-switch.org/downloads/snapshots/spandsp/spandsp-20080829.tar.gz

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@9425 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/spandsp/src/schedule.c

@@ -0,0 +1,149 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * schedule.c
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2004 Steve Underwood
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: schedule.c,v 1.17 2008/05/13 13:17:23 steveu Exp $
+ */
+
+#if defined(HAVE_CONFIG_H)
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <memory.h>
+
+#include "spandsp/telephony.h"
+#include "spandsp/logging.h"
+#include "spandsp/schedule.h"
+
+int span_schedule_event(span_sched_state_t *s, int us, span_sched_callback_func_t function, void *user_data)
+{
+    int i;
+
+    for (i = 0;  i < s->max_to_date;  i++)
+    {
+        if (s->sched[i].callback == NULL)
+            break;
+        /*endif*/
+    }
+    /*endfor*/
+    if (i >= s->allocated)
+    {
+        s->allocated += 5;
+        s->sched = (span_sched_t *) realloc(s->sched, sizeof(span_sched_t)*s->allocated);
+    }
+    /*endif*/
+    if (i >= s->max_to_date)
+        s->max_to_date = i + 1;
+    /*endif*/
+    s->sched[i].when = s->ticker + us;
+    s->sched[i].callback = function;
+    s->sched[i].user_data = user_data;
+    return i;
+}
+/*- End of function --------------------------------------------------------*/
+
+uint64_t span_schedule_next(span_sched_state_t *s)
+{
+    int i;
+    uint64_t earliest;
+
+    earliest = ~((uint64_t) 0);
+    for (i = 0;  i < s->max_to_date;  i++)
+    {
+        if (s->sched[i].callback  &&  earliest > s->sched[i].when)
+            earliest = s->sched[i].when;
+        /*endif*/
+    }
+    /*endfor*/
+    return earliest;
+}
+/*- End of function --------------------------------------------------------*/
+
+uint64_t span_schedule_time(span_sched_state_t *s)
+{
+    return s->ticker;
+}
+/*- End of function --------------------------------------------------------*/
+
+void span_schedule_update(span_sched_state_t *s, int us)
+{
+    int i;
+    span_sched_callback_func_t callback;
+    void *user_data;
+
+    s->ticker += us;
+    for (i = 0;  i < s->max_to_date;  i++)
+    {
+        if (s->sched[i].callback  &&  s->sched[i].when <= s->ticker)
+        {
+            callback = s->sched[i].callback;
+            user_data = s->sched[i].user_data;
+            s->sched[i].callback = NULL;
+            s->sched[i].user_data = NULL;
+            callback(s, user_data);
+        }
+        /*endif*/
+    }
+    /*endfor*/
+}
+/*- End of function --------------------------------------------------------*/
+
+void span_schedule_del(span_sched_state_t *s, int i)
+{
+    if (i >= s->max_to_date
+        ||
+        i < 0
+        ||
+        s->sched[i].callback == NULL)
+    {
+        span_log(&s->logging, SPAN_LOG_WARNING, "Requested to delete invalid scheduled ID %d ?\n", i);
+        return;
+    }
+    /*endif*/
+    s->sched[i].callback = NULL;
+}
+/*- End of function --------------------------------------------------------*/
+
+span_sched_state_t *span_schedule_init(span_sched_state_t *s)
+{
+    memset(s, 0, sizeof(*s));
+    span_log_init(&s->logging, SPAN_LOG_NONE, NULL);
+    span_log_set_protocol(&s->logging, "SCHEDULE");
+    return s;
+}
+/*- End of function --------------------------------------------------------*/
+
+int span_schedule_release(span_sched_state_t *s)
+{
+    if (s->sched)
+    {
+        free(s->sched);
+        s->sched = NULL;
+    }
+    return 0;
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/