74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
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/*
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* Copyright (c) 2021-2023 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file pubdef.h
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*
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* @brief The file contains macro definitions for some basic functions
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* in c_utils, for example, unit conversion and space freeup.
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*/
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#ifndef UTILS_BASE_PUBDEF_H
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#define UTILS_BASE_PUBDEF_H
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namespace OHOS {
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// Used for unit conversion from byte to megabyte
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#define B_TO_M(b) ((b) / 1024 / 1024)
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// Used for unit conversion from megabyte to byte
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#define M_TO_B(m) ((m) * 1024 * 1024)
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// Used for unit conversion from byte to kilobyte
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#define B_TO_K(b) ((b) / 1024)
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// Used for unit conversion from kilobyte to byte
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#define K_TO_B(m) ((m) * 1024)
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// Used for unit conversion from hour to second
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#define HOUR_TO_SECOND(h) ((h) * 3600)
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// Used for unit conversion from second to hour
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#define SECOND_TO_HOUR(s) ((s) / 3600)
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// Used to return the array size
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#define ARRAY_SIZE(a) (sizeof((a)) / sizeof((a[0])))
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// Used to free the space pointed by pointer p
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#define FREE_AND_NIL(p) do { if (p) { delete (p); (p) = nullptr; } } while(0)
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// Used to free the array space pointed by pointer p
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#define FREE_AND_NIL_ARRAY(p) do { if (p) { delete[] (p); (p) = nullptr; } } while(0)
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// Used to return the maximum of two numbers
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#define MAX(x, y) (((x) > (y)) ? (x) : (y))
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// Used to return the minimum of two numbers
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#define MIN(x, y) (((x) < (y)) ? (x) : (y))
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// Used to determine whether float number 'x' is 0
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#define EPS (1e-8)
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#define EQUAL_TO_ZERO(x) (fabs(x) <= (EPS))
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// Used to attempt a retry when the syscall error code is EINTR
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#ifndef TEMP_FAILURE_RETRY
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#define TEMP_FAILURE_RETRY(exp) \
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({ \
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decltype(exp) _rc; \
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do { \
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_rc = (exp); \
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} while ((_rc == -1) && (errno == EINTR)); \
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_rc; \
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})
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#endif
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}
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#endif
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