[lttng-ust.git] / include / ust-helper.h

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LTTNG_UST_HELPER_H
#define _LTTNG_UST_HELPER_H

#include <stdlib.h>

#include <lttng/ust-arch.h>

static inline
void *zmalloc(size_t len)
	__attribute__((always_inline));
static inline
void *zmalloc(size_t len)
{
	return calloc(len, 1);
}

#define max_t(type, x, y)				\
	({						\
		type __max1 = (x);              	\
		type __max2 = (y);              	\
		__max1 > __max2 ? __max1: __max2;	\
	})

#define min_t(type, x, y)				\
	({						\
		type __min1 = (x);              	\
		type __min2 = (y);              	\
		__min1 <= __min2 ? __min1: __min2;	\
	})

#define LTTNG_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

/*
 * Use of __builtin_return_address(0) sometimes seems to cause stack
 * corruption on 32-bit PowerPC. Disable this feature on that
 * architecture for now by always using the NULL value for the ip
 * context.
 */
#if defined(LTTNG_UST_ARCH_PPC) && !defined(LTTNG_UST_ARCH_PPC64)
#define LTTNG_UST_CALLER_IP()		NULL
#else
#define LTTNG_UST_CALLER_IP()		__builtin_return_address(0)
#endif

#endif /* _LTTNG_UST_HELPER_H */
Commit	Line	Data
	1	/*
	2	* SPDX-License-Identifier: LGPL-2.1-only
	3	*
	4	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	*/
	6
	7	#ifndef _LTTNG_UST_HELPER_H
	8	#define _LTTNG_UST_HELPER_H
	9
	10	#include <stdlib.h>
	11
	12	#include <lttng/ust-arch.h>
	13
	14	static inline
	15	void *zmalloc(size_t len)
	16	__attribute__((always_inline));
	17	static inline
	18	void *zmalloc(size_t len)
	19	{
	20	return calloc(len, 1);
	21	}
	22
	23	#define max_t(type, x, y) \
	24	({ \
	25	type __max1 = (x); \
	26	type __max2 = (y); \
	27	__max1 > __max2 ? __max1: __max2; \
	28	})
	29
	30	#define min_t(type, x, y) \
	31	({ \
	32	type __min1 = (x); \
	33	type __min2 = (y); \
	34	__min1 <= __min2 ? __min1: __min2; \
	35	})
	36
	37	#define LTTNG_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
	38
	39	/*
	40	* Use of __builtin_return_address(0) sometimes seems to cause stack
	41	* corruption on 32-bit PowerPC. Disable this feature on that
	42	* architecture for now by always using the NULL value for the ip
	43	* context.
	44	*/
	45	#if defined(LTTNG_UST_ARCH_PPC) && !defined(LTTNG_UST_ARCH_PPC64)
	46	#define LTTNG_UST_CALLER_IP() NULL
	47	#else
	48	#define LTTNG_UST_CALLER_IP() __builtin_return_address(0)
	49	#endif
	50
	51	#endif /* _LTTNG_UST_HELPER_H */