react-native/React/Base/RCTProfile.h

106 lines
3.0 KiB
Objective-C

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import <Foundation/Foundation.h>
#import "RCTDefines.h"
/**
* RCTProfile
*
* This file provides a set of functions and macros for performance profiling
*
* NOTE: This API is a work in a work in progress, please consider carefully
* before before using it.
*/
#if RCT_DEV
/**
* Returns YES if the profiling information is currently being collected
*/
RCT_EXTERN BOOL RCTProfileIsProfiling(void);
/**
* Start collecting profiling information
*/
RCT_EXTERN void RCTProfileInit(void);
/**
* Stop profiling and return a JSON string of the collected data - The data
* returned is compliant with google's trace event format - the format used
* as input to trace-viewer
*/
RCT_EXTERN NSString *RCTProfileEnd(void);
/**
* Collects the initial event information for the event and returns a reference ID
*/
RCT_EXTERN NSNumber *_RCTProfileBeginEvent(void);
/**
* The ID returned by BeginEvent should then be passed into EndEvent, with the
* rest of the event information. Just at this point the event will actually be
* registered
*/
RCT_EXTERN void _RCTProfileEndEvent(NSNumber *, NSString *, NSString *, id);
/**
* This pair of macros implicitly handle the event ID when beginning and ending
* an event, for both simplicity and performance reasons, this method is preferred
*
* NOTE: The EndEvent call has to be either, in the same scope of BeginEvent,
* or in a sub-scope, otherwise the ID stored by BeginEvent won't be accessible
* for EndEvent, in this case you may want to use the actual C functions.
*/
#define RCTProfileBeginEvent() \
_Pragma("clang diagnostic push") \
_Pragma("clang diagnostic ignored \"-Wshadow\"") \
NSNumber *__rct_profile_id = _RCTProfileBeginEvent(); \
_Pragma("clang diagnostic pop")
#define RCTProfileEndEvent(name, category, args...) \
_RCTProfileEndEvent(__rct_profile_id, name, category, args)
/**
* An event that doesn't have a duration (i.e. Notification, VSync, etc)
*/
RCT_EXTERN void RCTProfileImmediateEvent(NSString *, NSTimeInterval , NSString *);
/**
* Helper to profile the duration of the execution of a block. This method uses
* self and _cmd to name this event for simplicity sake.
*
* NOTE: The block can't expect any argument
*/
#define RCTProfileBlock(block, category, arguments) \
^{ \
RCTProfileBeginEvent(); \
block(); \
RCTProfileEndEvent([NSString stringWithFormat:@"[%@ %@]", NSStringFromClass([self class]), NSStringFromSelector(_cmd)], category, arguments); \
}
#else
#define RCTProfileIsProfiling(...) NO
#define RCTProfileInit(...)
#define RCTProfileEnd(...) @""
#define _RCTProfileBeginEvent(...) @0
#define RCTProfileBeginEvent(...)
#define _RCTProfileEndEvent(...)
#define RCTProfileEndEvent(...)
#define RCTProfileImmediateEvent(...)
#define RCTProfileBlock(block, ...) block
#endif