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
  22 #include <stdint.h>
  23 #include <stdlib.h>
  24 #include <babeltrace/babeltrace.h>
  25 #include <babeltrace/context.h>
  26 #include <babeltrace/context-internal.h>
  27 #include <babeltrace/trace-handle.h>
  28 #include <babeltrace/trace-handle-internal.h>
  29
  30 struct bt_trace_handle *bt_trace_handle_create(struct bt_context *ctx)
  31 {
  32         struct bt_trace_handle *th;
  33
  34         if (!ctx)
  35                 return NULL;
  36
  37         th = g_new0(struct bt_trace_handle, 1);
  38         th->id = ctx->last_trace_handle_id++;
  39         return th;
  40 }
  41
  42 void bt_trace_handle_destroy(struct bt_trace_handle *th)
  43 {
  44         g_free(th);
  45 }
  46
  47 int bt_trace_handle_get_id(struct bt_trace_handle *th)
  48 {
  49         if (!th)
  50                 return -1;
  51
  52         return th->id;
  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 uint64_t bt_trace_handle_get_timestamp_begin(struct bt_context *ctx,
  70                 int handle_id, enum bt_clock_type type)
  71 {
  72         struct bt_trace_handle *handle;
  73         uint64_t ret;
  74
  75         if (!ctx)
  76                 return -1ULL;
  77
  78         handle = g_hash_table_lookup(ctx->trace_handles,
  79                         (gpointer) (unsigned long) handle_id);
  80         if (!handle) {
  81                 ret = -1ULL;
  82                 goto end;
  83         }
  84         if (type == BT_CLOCK_REAL) {
  85                 ret = handle->real_timestamp_begin;
  86         } else if (type == BT_CLOCK_CYCLES) {
  87                 ret = handle->cycles_timestamp_begin;
  88         } else {
  89                 ret = -1ULL;
  90         }
  91
  92 end:
  93         return ret;
  94 }
  95
  96 uint64_t bt_trace_handle_get_timestamp_end(struct bt_context *ctx,
  97                 int handle_id, enum bt_clock_type type)
  98 {
  99         struct bt_trace_handle *handle;
 100         uint64_t ret;
 101
 102         if (!ctx)
 103                 return -1ULL;
 104
 105         handle = g_hash_table_lookup(ctx->trace_handles,
 106                         (gpointer) (unsigned long) handle_id);
 107         if (!handle) {
 108                 ret = -1ULL;
 109                 goto end;
 110         }
 111         if (type == BT_CLOCK_REAL) {
 112                 ret = handle->real_timestamp_end;
 113         } else if (type == BT_CLOCK_CYCLES) {
 114                 ret = handle->cycles_timestamp_end;
 115         } else {
 116                 ret = -1ULL;
 117         }
 118
 119 end:
 120         return ret;
 121 }