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/*
* Copyright (C) 2019 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#pragma once
#include <sys/cdefs.h>
#include <stdbool.h>
#include <stdint.h>
__BEGIN_DECLS
// Types of an android_fdtrack_event.
enum android_fdtrack_event_type {
// File descriptor creation: create is the active member of android_fdtrack_event::data.
ANDROID_FDTRACK_EVENT_TYPE_CREATE,
// File descriptor closed.
ANDROID_FDTRACK_EVENT_TYPE_CLOSE,
};
struct android_fdtrack_event {
// File descriptor for which this event occurred.
int fd;
// Type of event: this is one of the enumerators of android_fdtrack_event_type.
uint8_t type;
// Data for the event.
union {
struct {
const char* function_name;
} create;
} data;
};
// Callback invoked upon file descriptor creation/closure.
typedef void (*android_fdtrack_hook_t)(struct android_fdtrack_event*);
// Register a hook which is called to track fd lifecycle events.
bool android_fdtrack_compare_exchange_hook(android_fdtrack_hook_t* expected, android_fdtrack_hook_t value) __INTRODUCED_IN(30);
// Enable/disable fdtrack *on the current thread*.
// This is primarily useful when performing operations which you don't want to track
// (e.g. when emitting already-recorded information).
bool android_fdtrack_get_enabled() __INTRODUCED_IN(30);
bool android_fdtrack_set_enabled(bool new_value) __INTRODUCED_IN(30);
__END_DECLS
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