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pipewire/spa/include/spa/utils/defs.h

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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
#ifndef SPA_UTILS_DEFS_H
#define SPA_UTILS_DEFS_H
#ifdef __cplusplus
extern "C" {
# if __cplusplus >= 201103L
# define SPA_STATIC_ASSERT_IMPL(expr, msg, ...) static_assert(expr, msg)
# define SPA_ALIGNOF alignof
# endif
#elif __STDC_VERSION__ >= 202311L
# define SPA_STATIC_ASSERT_IMPL(expr, msg, ...) static_assert(expr, msg)
# define SPA_ALIGNOF alignof
#else
# include <stdbool.h>
# if __STDC_VERSION__ >= 201112L
# define SPA_STATIC_ASSERT_IMPL(expr, msg, ...) _Static_assert(expr, msg)
# define SPA_ALIGNOF _Alignof
# endif
#endif
#ifndef SPA_STATIC_ASSERT_IMPL
#define SPA_STATIC_ASSERT_IMPL(expr, ...) \
((void)sizeof(struct { int spa_static_assertion_failed : 2 * !!(expr) - 1; }))
#endif
#ifndef SPA_ALIGNOF
#define SPA_ALIGNOF __alignof__
#endif
#define SPA_STATIC_ASSERT(expr, ...) SPA_STATIC_ASSERT_IMPL(expr, ## __VA_ARGS__, "`" #expr "` evaluated to false")
#define SPA_CONCAT_NOEXPAND(a, b) a ## b
#define SPA_CONCAT(a, b) SPA_CONCAT_NOEXPAND(a, b)
#include <inttypes.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <stdio.h>
/**
* \defgroup spa_utils_defs Miscellaneous
* Helper macros and functions
*/
/**
* \addtogroup spa_utils_defs
* \{
*/
/**
* SPA_FALLTHROUGH is an annotation to suppress compiler warnings about switch
* cases that fall through without a break or return statement. SPA_FALLTHROUGH
* is only needed on cases that have code:
*
* switch (foo) {
* case 1: // These cases have no code. No fallthrough annotations are needed.
* case 2:
* case 3:
* foo = 4; // This case has code, so a fallthrough annotation is needed:
* SPA_FALLTHROUGH;
* default:
* return foo;
* }
*/
#if defined(__clang__) && defined(__cplusplus) && __cplusplus >= 201103L
/* clang's fallthrough annotations are only available starting in C++11. */
# define SPA_FALLTHROUGH [[clang::fallthrough]];
#elif __GNUC__ >= 7 || __clang_major__ >= 10
# define SPA_FALLTHROUGH __attribute__ ((fallthrough));
#else
# define SPA_FALLTHROUGH /* FALLTHROUGH */
#endif
#define SPA_FLAG_MASK(field,mask,flag) (((field) & (mask)) == (flag))
#define SPA_FLAG_IS_SET(field,flag) SPA_FLAG_MASK(field, flag, flag)
#define SPA_FLAG_SET(field,flag) ((field) |= (flag))
#define SPA_FLAG_CLEAR(field, flag) \
({ \
SPA_STATIC_ASSERT(__builtin_constant_p(flag) ? \
(__typeof__(flag))(__typeof__(field))(__typeof__(flag))(flag) == (flag) : \
sizeof(field) >= sizeof(flag), \
"truncation problem when masking " #field \
" with ~" #flag); \
((field) &= ~(__typeof__(field))(flag)); \
})
#define SPA_FLAG_UPDATE(field,flag,val) ((val) ? SPA_FLAG_SET((field),(flag)) : SPA_FLAG_CLEAR((field),(flag)))
enum spa_direction {
SPA_DIRECTION_INPUT = 0,
SPA_DIRECTION_OUTPUT = 1,
};
#define SPA_DIRECTION_REVERSE(d) ((d) ^ 1)
#define SPA_RECTANGLE(width,height) ((struct spa_rectangle){ (width), (height) })
struct spa_rectangle {
uint32_t width;
uint32_t height;
};
#define SPA_POINT(x,y) ((struct spa_point){ (x), (y) })
struct spa_point {
int32_t x;
int32_t y;
};
#define SPA_REGION(x,y,width,height) ((struct spa_region){ SPA_POINT(x,y), SPA_RECTANGLE(width,height) })
struct spa_region {
struct spa_point position;
struct spa_rectangle size;
};
#define SPA_FRACTION(num,denom) ((struct spa_fraction){ (num), (denom) })
struct spa_fraction {
uint32_t num;
uint32_t denom;
};
#define SPA_N_ELEMENTS(arr) (sizeof(arr) / sizeof((arr)[0]))
/**
* Array iterator macro. Usage:
* ```c
* struct foo array[16];
* struct foo *f;
* SPA_FOR_EACH_ELEMENT(array, f) {
* f->bar = baz;
* }
* ```
*/
#define SPA_FOR_EACH_ELEMENT(arr, ptr) \
for ((ptr) = arr; (void*)(ptr) < SPA_PTROFF(arr, sizeof(arr), void); (ptr)++)
#define SPA_FOR_EACH_ELEMENT_VAR(arr, var) \
for (__typeof__((arr)[0])* var = arr; (void*)(var) < SPA_PTROFF(arr, sizeof(arr), void); (var)++)
#define SPA_ABS(a) \
({ \
__typeof__(a) _a = (a); \
SPA_LIKELY(_a >= 0) ? _a : -_a; \
})
#define SPA_MIN(a,b) \
({ \
__typeof__(a) _min_a = (a); \
__typeof__(b) _min_b = (b); \
SPA_LIKELY(_min_a <= _min_b) ? _min_a : _min_b; \
})
#define SPA_MAX(a,b) \
({ \
__typeof__(a) _max_a = (a); \
__typeof__(b) _max_b = (b); \
SPA_LIKELY(_max_a >= _max_b) ? _max_a : _max_b; \
})
#define SPA_CLAMP(v,low,high) \
({ \
__typeof__(v) _v = (v); \
__typeof__(low) _low = (low); \
__typeof__(high) _high = (high); \
SPA_MIN(SPA_MAX(_v, _low), _high); \
})
#define SPA_CLAMPF(v,low,high) \
({ \
fminf(fmaxf(v, low), high); \
})
#define SPA_SWAP(a,b) \
({ \
__typeof__(a) _t = (a); \
(a) = b; (b) = _t; \
})
#define SPA_TYPECHECK(type,x) \
({ type _dummy; \
typeof(x) _dummy2; \
(void)(&_dummy == &_dummy2); \
x; \
})
/**
* Return the address (buffer + offset) as pointer of \a type
*/
#define SPA_PTROFF(ptr_,offset_,type_) ((type_*)((uintptr_t)(ptr_) + (ptrdiff_t)(offset_)))
#define SPA_PTROFF_ALIGN(ptr_,offset_,alignment_,type_) \
SPA_PTR_ALIGN(SPA_PTROFF(ptr_,offset_,type_),alignment_,type_)
/**
* Deprecated, use SPA_PTROFF and SPA_PTROFF_ALIGN instead
*/
#define SPA_MEMBER(b,o,t) SPA_PTROFF(b,o,t)
#define SPA_MEMBER_ALIGN(b,o,a,t) SPA_PTROFF_ALIGN(b,o,a,t)
#define SPA_CONTAINER_OF(p,t,m) ((t*)((uintptr_t)(p) - offsetof(t,m)))
#define SPA_PTRDIFF(p1,p2) ((intptr_t)(p1) - (intptr_t)(p2))
#define SPA_PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
#define SPA_UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))
#define SPA_TIME_INVALID ((int64_t)INT64_MIN)
#define SPA_IDX_INVALID ((unsigned int)-1)
#define SPA_ID_INVALID ((uint32_t)0xffffffff)
#define SPA_NSEC_PER_SEC (1000000000LL)
#define SPA_NSEC_PER_MSEC (1000000ll)
#define SPA_NSEC_PER_USEC (1000ll)
#define SPA_USEC_PER_SEC (1000000ll)
#define SPA_USEC_PER_MSEC (1000ll)
#define SPA_MSEC_PER_SEC (1000ll)
#define SPA_TIMESPEC_TO_NSEC(ts) ((ts)->tv_sec * SPA_NSEC_PER_SEC + (ts)->tv_nsec)
#define SPA_TIMESPEC_TO_USEC(ts) ((ts)->tv_sec * SPA_USEC_PER_SEC + (ts)->tv_nsec / SPA_NSEC_PER_USEC)
#define SPA_TIMEVAL_TO_NSEC(tv) ((tv)->tv_sec * SPA_NSEC_PER_SEC + (tv)->tv_usec * SPA_NSEC_PER_USEC)
#define SPA_TIMEVAL_TO_USEC(tv) ((tv)->tv_sec * SPA_USEC_PER_SEC + (tv)->tv_usec)
#ifdef __GNUC__
#define SPA_PRINTF_FUNC(fmt, arg1) __attribute__((format(printf, fmt, arg1)))
#define SPA_FORMAT_ARG_FUNC(arg1) __attribute__((format_arg(arg1)))
#define SPA_ALIGNED(align) __attribute__((aligned(align)))
#define SPA_DEPRECATED __attribute__ ((deprecated))
#define SPA_EXPORT __attribute__((visibility("default")))
#define SPA_SENTINEL __attribute__((__sentinel__))
#define SPA_UNUSED __attribute__ ((unused))
#define SPA_NORETURN __attribute__ ((noreturn))
#define SPA_WARN_UNUSED_RESULT __attribute__ ((warn_unused_result))
#else
#define SPA_PRINTF_FUNC(fmt, arg1)
#define SPA_FORMAT_ARG_FUNC(arg1)
#define SPA_ALIGNED(align)
#define SPA_DEPRECATED
#define SPA_EXPORT
#define SPA_SENTINEL
#define SPA_UNUSED
#define SPA_NORETURN
#define SPA_WARN_UNUSED_RESULT
#endif
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
#define SPA_RESTRICT restrict
#elif defined(__GNUC__) && __GNUC__ >= 4
#define SPA_RESTRICT __restrict__
#else
#define SPA_RESTRICT
#endif
#define SPA_ROUND_DOWN(num,value) \
({ \
__typeof__(num) _num = (num); \
((_num) - ((_num) % (value))); \
})
#define SPA_ROUND_UP(num,value) \
({ \
__typeof__(value) _v = (value); \
((((num) + (_v) - 1) / (_v)) * (_v)); \
})
#define SPA_ROUND_MASK(num,mask) ((__typeof__(num))((mask)-1))
#define SPA_ROUND_DOWN_N(num,align) ((num) & ~SPA_ROUND_MASK(num, align))
#define SPA_ROUND_UP_N(num,align) ((((num)-1) | SPA_ROUND_MASK(num, align))+1)
#define SPA_SCALE32_UP(val,num,denom) \
({ \
uint64_t _val = (val); \
uint64_t _denom = (denom); \
(uint32_t)(((_val) * (num) + (_denom)-1) / (_denom)); \
})
#define SPA_PTR_ALIGNMENT(p,align) ((uintptr_t)(p) & ((align)-1))
#define SPA_IS_ALIGNED(p,align) (SPA_PTR_ALIGNMENT(p,align) == 0)
#define SPA_PTR_ALIGN(p,align,type) ((type*)SPA_ROUND_UP_N((intptr_t)(p), (intptr_t)(align)))
#ifndef SPA_LIKELY
#ifdef __GNUC__
#define SPA_LIKELY(x) (__builtin_expect(!!(x),1))
#define SPA_UNLIKELY(x) (__builtin_expect(!!(x),0))
#else
#define SPA_LIKELY(x) (x)
#define SPA_UNLIKELY(x) (x)
#endif
#endif
static inline bool spa_ptrinside(const void *p1, size_t s1, const void *p2, size_t s2,
size_t *remaining)
{
if (SPA_LIKELY((uintptr_t)p1 <= (uintptr_t)p2 && s2 <= s1 &&
(uintptr_t)p2 - (uintptr_t)p1 <= s1 - s2)) {
if (remaining != NULL)
*remaining = ((uintptr_t)p1 + s1) - ((uintptr_t)p2 + s2);
return true;
} else {
if (remaining != NULL)
*remaining = 0;
return false;
}
}
static inline bool spa_ptr_inside_and_aligned(const void *p1, size_t s1,
const void *p2, size_t s2, size_t align,
size_t *remaining)
{
if (SPA_IS_ALIGNED(p2, align)) {
return spa_ptrinside(p1, s1, p2, s2, remaining);
} else {
if (remaining != NULL)
*remaining = 0;
return false;
}
}
#define spa_ptr_type_inside(p1, s1, p2, type, remaining) \
spa_ptr_inside_and_aligned(p1, s1, p2, sizeof(type), SPA_ALIGNOF(type), remaining)
#define SPA_PTR_TO_INT(p) ((int) ((intptr_t) (p)))
#define SPA_INT_TO_PTR(u) ((void*) ((intptr_t) (u)))
#define SPA_STRINGIFY_1(...) #__VA_ARGS__
#define SPA_STRINGIFY(...) SPA_STRINGIFY_1(__VA_ARGS__)
#define spa_return_if_fail(expr) \
do { \
if (SPA_UNLIKELY(!(expr))) { \
fprintf(stderr, "'%s' failed at %s:%u %s()\n", \
#expr , __FILE__, __LINE__, __func__); \
return; \
} \
} while(false)
#define spa_return_val_if_fail(expr, val) \
do { \
if (SPA_UNLIKELY(!(expr))) { \
fprintf(stderr, "'%s' failed at %s:%u %s()\n", \
#expr , __FILE__, __LINE__, __func__); \
return (val); \
} \
} while(false)
/* spa_assert_se() is an assert which guarantees side effects of x,
* i.e. is never optimized away, regardless of NDEBUG or FASTPATH. */
#ifndef __COVERITY__
#define spa_assert_se(expr) \
do { \
if (SPA_UNLIKELY(!(expr))) { \
fprintf(stderr, "'%s' failed at %s:%u %s()\n", \
#expr , __FILE__, __LINE__, __func__); \
abort(); \
} \
} while (false)
#else
#define spa_assert_se(expr) \
do { \
int _unique_var = (expr); \
if (!_unique_var) \
abort(); \
} while (false)
#endif
/* Does exactly nothing */
#define spa_nop() do {} while (false)
#ifdef NDEBUG
#define spa_assert(expr) spa_nop()
#elif defined (FASTPATH)
#define spa_assert(expr) spa_assert_se(expr)
#else
#define spa_assert(expr) spa_assert_se(expr)
#endif
#ifdef NDEBUG
#define spa_assert_not_reached() abort()
#else
#define spa_assert_not_reached() \
do { \
fprintf(stderr, "Code should not be reached at %s:%u %s()\n", \
__FILE__, __LINE__, __func__); \
abort(); \
} while (false)
#endif
#define spa_memzero(x,l) (memset((x), 0, (l)))
#define spa_zero(x) (spa_memzero(&(x), sizeof(x)))
#ifdef SPA_DEBUG_MEMCPY
#define spa_memcpy(d,s,n) \
({ \
fprintf(stderr, "%s:%u %s() memcpy(%p, %p, %zd)\n", \
__FILE__, __LINE__, __func__, (d), (s), (size_t)(n)); \
memcpy(d,s,n); \
})
#define spa_memmove(d,s,n) \
({ \
fprintf(stderr, "%s:%u %s() memmove(%p, %p, %zd)\n", \
__FILE__, __LINE__, __func__, (d), (s), (size_t)(n)); \
memmove(d,s,n); \
})
#else
#define spa_memcpy(d,s,n) memcpy(d,s,n)
#define spa_memmove(d,s,n) memmove(d,s,n)
#endif
#define spa_aprintf(_fmt, ...) \
({ \
char *_strp; \
if (asprintf(&(_strp), (_fmt), ## __VA_ARGS__ ) == -1) \
_strp = NULL; \
_strp; \
})
/**
* \}
*/
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SPA_UTILS_DEFS_H */
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