87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2016 Cyril Hrubis <chrubis@suse.cz>
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* Copyright (c) 2013 Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
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* Copyright (c) 2010 Ngie Cooper <yaneurabeya@gmail.com>
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* Copyright (c) 2008 Mike Frysinger <vapier@gmail.com>
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*/
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#ifndef TST_COMMON_H__
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#define TST_COMMON_H__
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#define LTP_ATTRIBUTE_NORETURN __attribute__((noreturn))
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#define LTP_ATTRIBUTE_UNUSED __attribute__((unused))
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#define LTP_ATTRIBUTE_UNUSED_RESULT __attribute__((warn_unused_result))
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#ifndef ARRAY_SIZE
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# define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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#endif
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/* Round x to the next multiple of a.
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* a should be a power of 2.
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*/
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#define LTP_ALIGN(x, a) __LTP_ALIGN_MASK(x, (typeof(x))(a) - 1)
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#define __LTP_ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
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/**
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* TST_RETRY_FUNC() - Repeatedly retry a function with an increasing delay.
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* @FUNC - The function which will be retried
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* @ECHCK - Function/macro for validating @FUNC return value
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*
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* This macro will call @FUNC in a loop with a delay between retries.
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* If ECHCK(ret) evaluates to non-zero, the loop ends. The delay between
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* retries starts at one microsecond and is then doubled each iteration until
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* it exceeds one second (the total time sleeping will be approximately one
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* second as well). When the delay exceeds one second, the loop will end.
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* The TST_RETRY_FUNC() macro returns the last value returned by @FUNC.
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*/
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#define TST_RETRY_FUNC(FUNC, ECHCK) \
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TST_RETRY_FN_EXP_BACKOFF(FUNC, ECHCK, 1)
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#define TST_RETRY_FN_EXP_BACKOFF(FUNC, ECHCK, MAX_DELAY) \
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({ unsigned int tst_delay_, tst_max_delay_; \
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typeof(FUNC) tst_ret_; \
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tst_delay_ = 1; \
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tst_max_delay_ = tst_multiply_timeout(MAX_DELAY * 1000000); \
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for (;;) { \
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errno = 0; \
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tst_ret_ = FUNC; \
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if (ECHCK(tst_ret_)) \
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break; \
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if (tst_delay_ < tst_max_delay_) { \
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usleep(tst_delay_); \
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tst_delay_ *= 2; \
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} else { \
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break; \
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} \
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} \
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tst_ret_; \
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})
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/*
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* Return value validation macros for TST_RETRY_FUNC():
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* TST_RETVAL_EQ0() - Check that value is equal to zero
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*/
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#define TST_RETVAL_EQ0(x) (!(x))
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/*
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* TST_RETVAL_NOTNULL() - Check that value is not equal to zero/NULL
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*/
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#define TST_RETVAL_NOTNULL(x) (!!(x))
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/*
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* TST_RETVAL_GE0() - Check that value is greater than or equal to zero
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*/
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#define TST_RETVAL_GE0(x) ((x) >= 0)
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#define TST_BUILD_BUG_ON(condition) \
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do { ((void)sizeof(char[1 - 2 * !!(condition)])); } while (0)
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#define TST_BRK_SUPPORTS_ONLY_TCONF_TBROK(condition) \
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TST_BUILD_BUG_ON(condition)
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#define TST_RES_SUPPORTS_TCONF_TFAIL_TINFO_TPASS_TWARN(condition) \
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TST_BUILD_BUG_ON(condition)
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#endif /* TST_COMMON_H__ */
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