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