lib/trace-handle.c

   1 /*
   2  * trace_handle.c
   3  *
   4  * Babeltrace Library
   5  *
   6  * Copyright 2012 EfficiOS Inc. and Linux Foundation
   7  *
   8  * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   9  *         Julien Desfossez <julien.desfossez@efficios.com>
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a copy
  12  * of this software and associated documentation files (the "Software"), to deal
  13  * in the Software without restriction, including without limitation the rights
  14  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  15  * copies of the Software, and to permit persons to whom the Software is
  16  * furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included in
  19  * all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  24  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  26  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  27  * SOFTWARE.
  28  */
  29
  30 #include <stdint.h>
  31 #include <stdlib.h>
  32 #include <babeltrace/babeltrace.h>
  33 #include <babeltrace/context.h>
  34 #include <babeltrace/context-internal.h>
  35 #include <babeltrace/trace-handle.h>
  36 #include <babeltrace/trace-handle-internal.h>
  37
  38 struct bt_trace_handle *bt_trace_handle_create(struct bt_context *ctx)
  39 {
  40         struct bt_trace_handle *th;
  41
  42         if (!ctx)
  43                 return NULL;
  44
  45         th = g_new0(struct bt_trace_handle, 1);
  46         th->id = ctx->last_trace_handle_id++;
  47         return th;
  48 }
  49
  50 void bt_trace_handle_destroy(struct bt_trace_handle *th)
  51 {
  52         g_free(th);
  53 }
  54
  55 const char *bt_trace_handle_get_path(struct bt_context *ctx, int handle_id)
  56 {
  57         struct bt_trace_handle *handle;
  58
  59         if (!ctx)
  60                 return NULL;
  61
  62         handle = g_hash_table_lookup(ctx->trace_handles,
  63                         (gpointer) (unsigned long) handle_id);
  64         if (!handle)
  65                 return NULL;
  66         return handle->path;
  67 }
  68
  69 int bt_trace_handle_get_timestamp_begin(struct bt_context *ctx,
  70                 int handle_id, enum bt_clock_type type,
  71                 int64_t *timestamp)
  72 {
  73         struct bt_trace_handle *handle;
  74         int ret = 0;
  75
  76         if (!ctx || !timestamp)
  77                 return -1;
  78
  79         handle = g_hash_table_lookup(ctx->trace_handles,
  80                         (gpointer) (unsigned long) handle_id);
  81         if (!handle) {
  82                 ret = -1;
  83                 goto end;
  84         }
  85         if (type == BT_CLOCK_REAL) {
  86                 *timestamp = handle->real_timestamp_begin;
  87         } else if (type == BT_CLOCK_CYCLES) {
  88                 *timestamp = handle->cycles_timestamp_begin;
  89         } else {
  90                 ret = -1;
  91         }
  92
  93 end:
  94         return ret;
  95 }
  96
  97 int bt_trace_handle_get_timestamp_end(struct bt_context *ctx,
  98                 int handle_id, enum bt_clock_type type,
  99                 int64_t *timestamp)
 100 {
 101         struct bt_trace_handle *handle;
 102         int ret = 0;
 103
 104         if (!ctx || !timestamp)
 105                 return -1;
 106
 107         handle = g_hash_table_lookup(ctx->trace_handles,
 108                         (gpointer) (unsigned long) handle_id);
 109         if (!handle) {
 110                 ret = -1;
 111                 goto end;
 112         }
 113         if (type == BT_CLOCK_REAL) {
 114                 *timestamp = handle->real_timestamp_end;
 115         } else if (type == BT_CLOCK_CYCLES) {
 116                 *timestamp = handle->cycles_timestamp_end;
 117         } else {
 118                 ret = -1;
 119         }
 120
 121 end:
 122         return ret;
 123 }