temp_failure_retry.h

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/*
 * Copyright (C) 2026 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#pragma once
 
#include <errno.h>
 
// glibc-ism, not guaranteed by posix
#ifndef TEMP_FAILURE_RETRY
// https://cs.android.com/android/platform/superproject/+/android-latest-release:bionic/libc/include/unistd.h;l=479;drc=3f4f1697e89d3904f441db4977920448d3861a10
/* Used to retry syscalls that can return EINTR. */
#define TEMP_FAILURE_RETRY(exp)            \
  ({                                       \
    __typeof__(exp) _rc;                   \
    do {                                   \
      _rc = (exp);                         \
    } while (_rc == -1 && errno == EINTR); \
    _rc;                                   \
  })
#endif