dart-sdk/runtime/bin/io_buffer.h
Martin Kustermann c3def74ffe [vm/io] Shrink buffers using realloc() if actual used data is small
Issue b/178993708

TEST=standalone{,_2}/io/large_file_read_small_file_test

Change-Id: I3c6f09f4f79f6dd1150db2918cefed3587e34012
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182268
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
2021-02-02 20:04:22 +00:00

44 lines
1.2 KiB
C++

// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_BIN_IO_BUFFER_H_
#define RUNTIME_BIN_IO_BUFFER_H_
#include "include/dart_api.h"
#include "platform/globals.h"
namespace dart {
namespace bin {
class IOBuffer {
public:
// Allocate an IO buffer dart object (of type Uint8List) backed by
// an external byte array.
static Dart_Handle Allocate(intptr_t size, uint8_t** buffer);
// Allocate IO buffer storage.
static uint8_t* Allocate(intptr_t size);
// Reallocate IO buffer storage.
static uint8_t* Reallocate(uint8_t* buffer, intptr_t new_size);
// Function for disposing of IO buffer storage. All backing storage
// for IO buffers must be freed using this function.
static void Free(void* buffer) { free(buffer); }
// Function for finalizing external byte arrays used as IO buffers.
static void Finalizer(void* isolate_callback_data, void* buffer) {
Free(buffer);
}
private:
DISALLOW_ALLOCATION();
DISALLOW_IMPLICIT_CONSTRUCTORS(IOBuffer);
};
} // namespace bin
} // namespace dart
#endif // RUNTIME_BIN_IO_BUFFER_H_