PipeWire 1.6.8

Loading...
Searching...
No Matches
defs.h
Go to the documentation of this file.
1/* Simple Plugin API */
2/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
3/* SPDX-License-Identifier: MIT */
4
5#ifndef SPA_UTILS_DEFS_H
6#define SPA_UTILS_DEFS_H
7
8#include <inttypes.h>
9#include <signal.h>
10#include <stdlib.h>
11#include <string.h>
12#include <stddef.h>
13#include <stdio.h>
14
15#ifdef __cplusplus
16 extern "C" {
17# if __cplusplus >= 201103L
18# define SPA_STATIC_ASSERT_IMPL(expr, msg, ...) static_assert(expr, msg)
19# define SPA_ALIGNOF alignof
20# endif
21#elif __STDC_VERSION__ >= 202311L
22# define SPA_STATIC_ASSERT_IMPL(expr, msg, ...) static_assert(expr, msg)
23# define SPA_ALIGNOF alignof
24#else
25# include <stdbool.h>
26# if __STDC_VERSION__ >= 201112L
27# define SPA_STATIC_ASSERT_IMPL(expr, msg, ...) _Static_assert(expr, msg)
28# define SPA_ALIGNOF _Alignof
29# endif
30#endif
31#ifndef SPA_STATIC_ASSERT_IMPL
32#define SPA_STATIC_ASSERT_IMPL(expr, ...) \
33 ((void)sizeof(struct { int spa_static_assertion_failed : 2 * !!(expr) - 1; }))
34#endif
35#ifndef SPA_ALIGNOF
36#define SPA_ALIGNOF __alignof__
37#endif
38
39#define SPA_STATIC_ASSERT(expr, ...) SPA_STATIC_ASSERT_IMPL(expr, ## __VA_ARGS__, "`" #expr "` evaluated to false")
40
41#define SPA_CONCAT_NOEXPAND(a, b) a ## b
42#define SPA_CONCAT(a, b) SPA_CONCAT_NOEXPAND(a, b)
43
48
53
69#if defined(__clang__) && defined(__cplusplus) && __cplusplus >= 201103L
70 /* clang's fallthrough annotations are only available starting in C++11. */
71# define SPA_FALLTHROUGH [[clang::fallthrough]];
72#elif __GNUC__ >= 7 || __clang_major__ >= 10
73# define SPA_FALLTHROUGH __attribute__ ((fallthrough));
74#else
75# define SPA_FALLTHROUGH /* FALLTHROUGH */
76#endif
77
78#define SPA_FLAG_MASK(field,mask,flag) (((field) & (mask)) == (flag))
79#define SPA_FLAG_IS_SET(field,flag) SPA_FLAG_MASK(field, flag, flag)
80
81#define SPA_FLAG_SET(field,flag) ((field) |= (flag))
82#define SPA_FLAG_CLEAR(field, flag) \
83({ \
84 SPA_STATIC_ASSERT(__builtin_constant_p(flag) ? \
85 (__typeof__(flag))(__typeof__(field))(__typeof__(flag))(flag) == (flag) : \
86 sizeof(field) >= sizeof(flag), \
87 "truncation problem when masking " #field \
88 " with ~" #flag); \
89 ((field) &= ~(__typeof__(field))(flag)); \
90})
91#define SPA_FLAG_UPDATE(field,flag,val) ((val) ? SPA_FLAG_SET((field),(flag)) : SPA_FLAG_CLEAR((field),(flag)))
92
93 enum spa_direction {
94 SPA_DIRECTION_INPUT = 0,
95 SPA_DIRECTION_OUTPUT = 1,
96};
97
98#define SPA_DIRECTION_REVERSE(d) ((d) ^ 1)
99
100#define SPA_RECTANGLE(width,height) ((struct spa_rectangle){ (width), (height) })
101 struct spa_rectangle {
102 uint32_t width;
103 uint32_t height;
104};
105
106#define SPA_POINT(x,y) ((struct spa_point){ (x), (y) })
107 struct spa_point {
108 int32_t x;
109 int32_t y;
110};
111
112#define SPA_REGION(x,y,width,height) ((struct spa_region){ SPA_POINT(x,y), SPA_RECTANGLE(width,height) })
113 struct spa_region {
114 struct spa_point position;
115 struct spa_rectangle size;
116};
117
118#define SPA_FRACTION(num,denom) ((struct spa_fraction){ (num), (denom) })
119 struct spa_fraction {
120 uint32_t num;
121 uint32_t denom;
122};
123
124#define SPA_N_ELEMENTS(arr) (sizeof(arr) / sizeof((arr)[0]))
127
130 * SPA_FOR_EACH_ELEMENT(array, f) {
131 * f->bar = baz;
132 * }
133 * ```
134 */
135#define SPA_FOR_EACH_ELEMENT(arr, ptr) \
136 for ((ptr) = arr; (ptr) < (arr) + SPA_N_ELEMENTS(arr); (ptr)++)
137
138#define SPA_FOR_EACH_ELEMENT_VAR(arr, var) \
139 for (__typeof__((arr)[0])* var = arr; (var) < (arr) + SPA_N_ELEMENTS(arr); (var)++)
140
141#define SPA_ABS(a) \
142({ \
143 __typeof__(a) _a = (a); \
144 SPA_LIKELY(_a >= 0) ? _a : -_a; \
145})
146#define SPA_MIN(a,b) \
147({ \
148 __typeof__(a) _min_a = (a); \
149 __typeof__(b) _min_b = (b); \
150 SPA_LIKELY(_min_a <= _min_b) ? _min_a : _min_b; \
151})
152#define SPA_MAX(a,b) \
153({ \
154 __typeof__(a) _max_a = (a); \
155 __typeof__(b) _max_b = (b); \
156 SPA_LIKELY(_max_a >= _max_b) ? _max_a : _max_b; \
157})
158#define SPA_CLAMP(v,low,high) \
159({ \
160 __typeof__(v) _v = (v); \
161 __typeof__(low) _low = (low); \
162 __typeof__(high) _high = (high); \
163 SPA_MIN(SPA_MAX(_v, _low), _high); \
164})
165
166#define SPA_CLAMPF(v,low,high) \
167({ \
168 fminf(fmaxf(v, low), high); \
169})
170#define SPA_CLAMPD(v,low,high) \
171({ \
172 fmin(fmax(v, low), high); \
173})
174
175
176#define SPA_SWAP(a,b) \
177({ \
178 __typeof__(a) _t = (a); \
179 (a) = b; (b) = _t; \
180})
181
182#define SPA_TYPECHECK(type,x) \
183({ type _dummy; \
184 typeof(x) _dummy2; \
185 (void)(&_dummy == &_dummy2); \
186 x; \
187})
188
189
189/** 3-way comparison. NaN > NaN and NaN > finite numbers */
190#define SPA_CMP(a, b) \
191({ \
192 __typeof__(a) _a = (a); \
193 __typeof__(b) _b = (b); \
194 (_a > _b) ? 1 : (_a == _b) ? 0 : (_a < _b) ? -1 \
195 : (_a == _a) ? -1 : (_b == _b) ? 1 \
196 : 1; \
197})
198
200
201 */
202#define SPA_PTROFF(ptr_,offset_,type_) ((type_*)((uintptr_t)(ptr_) + (ptrdiff_t)(offset_)))
203#define SPA_PTROFF_ALIGN(ptr_,offset_,alignment_,type_) \
204 SPA_PTR_ALIGN(SPA_PTROFF(ptr_,offset_,type_),alignment_,type_)
205
207
209#define SPA_MEMBER(b,o,t) SPA_PTROFF(b,o,t)
210#define SPA_MEMBER_ALIGN(b,o,a,t) SPA_PTROFF_ALIGN(b,o,a,t)
211
212#define SPA_CONTAINER_OF(p,t,m) ((t*)((uintptr_t)(p) - offsetof(t,m)))
213
214#define SPA_PTRDIFF(p1,p2) ((intptr_t)(p1) - (intptr_t)(p2))
215
216#define SPA_PTR_TO_UINT32(p) ((uint32_t) ((uintptr_t) (p)))
217#define SPA_UINT32_TO_PTR(u) ((void*) ((uintptr_t) (u)))
218
219#define SPA_TIME_INVALID ((int64_t)INT64_MIN)
220#define SPA_IDX_INVALID ((unsigned int)-1)
221#define SPA_ID_INVALID ((uint32_t)0xffffffff)
222
223#define SPA_NSEC_PER_SEC (1000000000LL)
224#define SPA_NSEC_PER_MSEC (1000000ll)
225#define SPA_NSEC_PER_USEC (1000ll)
226#define SPA_USEC_PER_SEC (1000000ll)
227#define SPA_USEC_PER_MSEC (1000ll)
228#define SPA_MSEC_PER_SEC (1000ll)
229
230#define SPA_TIMESPEC_TO_NSEC(ts) ((ts)->tv_sec * SPA_NSEC_PER_SEC + (ts)->tv_nsec)
231#define SPA_TIMESPEC_TO_USEC(ts) ((ts)->tv_sec * SPA_USEC_PER_SEC + (ts)->tv_nsec / SPA_NSEC_PER_USEC)
232#define SPA_TIMEVAL_TO_NSEC(tv) ((tv)->tv_sec * SPA_NSEC_PER_SEC + (tv)->tv_usec * SPA_NSEC_PER_USEC)
233#define SPA_TIMEVAL_TO_USEC(tv) ((tv)->tv_sec * SPA_USEC_PER_SEC + (tv)->tv_usec)
234
235#ifdef __GNUC__
236#define SPA_PRINTF_FUNC(fmt, arg1) __attribute__((format(printf, fmt, arg1)))
237#define SPA_FORMAT_ARG_FUNC(arg1) __attribute__((format_arg(arg1)))
238#define SPA_ALIGNED(align) __attribute__((aligned(align)))
239#define SPA_DEPRECATED __attribute__ ((deprecated))
240#define SPA_EXPORT __attribute__((visibility("default")))
241#define SPA_SENTINEL __attribute__((__sentinel__))
242#define SPA_UNUSED __attribute__ ((unused))
243#define SPA_NORETURN __attribute__ ((noreturn))
244#define SPA_WARN_UNUSED_RESULT __attribute__ ((warn_unused_result))
245#define SPA_BARRIER __asm__ __volatile__("": : :"memory")
246#else
247#define SPA_PRINTF_FUNC(fmt, arg1)
248#define SPA_FORMAT_ARG_FUNC(arg1)
249#define SPA_ALIGNED(align)
250#define SPA_DEPRECATED
251#define SPA_EXPORT
252#define SPA_SENTINEL
253#define SPA_UNUSED
254#define SPA_NORETURN
255#define SPA_WARN_UNUSED_RESULT
256#define SPA_BARRIER
257#endif
258
259#ifndef SPA_API_IMPL
260#define SPA_API_PROTO static inline
261#define SPA_API_IMPL static inline
262#endif
263
264#ifndef SPA_API_UTILS_DEFS
265 #ifdef SPA_API_IMPL
266 #define SPA_API_UTILS_DEFS SPA_API_IMPL
267 #else
268 #define SPA_API_UTILS_DEFS static inline
269 #endif
270#endif
271
272
273#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
274#define SPA_RESTRICT restrict
275#elif defined(__GNUC__) && __GNUC__ >= 4
276#define SPA_RESTRICT __restrict__
277#else
278#define SPA_RESTRICT
279#endif
280
281#define SPA_ROUND_DOWN(num,value) \
282({ \
283 __typeof__(num) _num = (num); \
284 ((_num) - ((_num) % (value))); \
285})
286#define SPA_ROUND_UP(num,value) \
287({ \
288 __typeof__(value) _v = (value); \
289 ((((num) + (_v) - 1) / (_v)) * (_v)); \
290})
291
292#define SPA_ROUND_MASK(num,mask) ((__typeof__(num))((mask)-1))
293
294#define SPA_ROUND_DOWN_N(num,align) ((num) & ~SPA_ROUND_MASK(num, align))
295#define SPA_ROUND_UP_N(num,align) ((((num)-1) | SPA_ROUND_MASK(num, align))+1)
296
297#define SPA_SCALE32(val,num,denom) \
298({ \
299 uint64_t _val = (val); \
300 uint64_t _denom = (denom); \
301 (uint32_t)(((_val) * (num)) / (_denom)); \
302})
303
304#define SPA_SCALE32_UP(val,num,denom) \
305({ \
306 uint64_t _val = (val); \
307 uint64_t _denom = (denom); \
308 (uint32_t)(((_val) * (num) + (_denom)-1) / (_denom)); \
309})
310
311
312#define SPA_PTR_ALIGNMENT(p,align) ((uintptr_t)(p) & ((align)-1))
313#define SPA_IS_ALIGNED(p,align) (SPA_PTR_ALIGNMENT(p,align) == 0)
314#define SPA_PTR_ALIGN(p,align,type) ((type*)SPA_ROUND_UP_N((intptr_t)(p), (intptr_t)(align)))
315
316#ifndef SPA_LIKELY
317#ifdef __GNUC__
318#define SPA_LIKELY(x) (__builtin_expect(!!(x),1))
319#define SPA_UNLIKELY(x) (__builtin_expect(!!(x),0))
320#else
321#define SPA_LIKELY(x) (x)
322#define SPA_UNLIKELY(x) (x)
323#endif
324#endif
325
326 SPA_API_UTILS_DEFS bool spa_ptrinside(const void *p1, size_t s1, const void *p2, size_t s2,
327 size_t *remaining)
328{
329 if (SPA_LIKELY((uintptr_t)p1 <= (uintptr_t)p2 && s2 <= s1 &&
330 (uintptr_t)p2 - (uintptr_t)p1 <= s1 - s2)) {
331 if (remaining != NULL)
332 *remaining = ((uintptr_t)p1 + s1) - ((uintptr_t)p2 + s2);
333 return true;
334 } else {
335 if (remaining != NULL)
336 *remaining = 0;
337 return false;
338 }
339}
340
341 SPA_API_UTILS_DEFS bool spa_ptr_inside_and_aligned(const void *p1, size_t s1,
342 const void *p2, size_t s2, size_t align,
343 size_t *remaining)
344{
345 if (SPA_IS_ALIGNED(p2, align)) {
346 return spa_ptrinside(p1, s1, p2, s2, remaining);
347 } else {
348 if (remaining != NULL)
349 *remaining = 0;
350 return false;
351 }
352}
353
354#define spa_ptr_type_inside(p1, s1, p2, type, remaining) \
355 spa_ptr_inside_and_aligned(p1, s1, p2, sizeof(type), SPA_ALIGNOF(type), remaining)
356
357#define SPA_PTR_TO_INT(p) ((int) ((intptr_t) (p)))
358#define SPA_INT_TO_PTR(u) ((void*) ((intptr_t) (u)))
359
360#define SPA_STRINGIFY_1(...) #__VA_ARGS__
361#define SPA_STRINGIFY(...) SPA_STRINGIFY_1(__VA_ARGS__)
362
363 struct spa_error_location {
364 int line;
365 int col;
366 size_t len;
367 const char *location;
368 const char *reason;
369};
370
371#define spa_return_if_fail(expr) \
372 do { \
373 if (SPA_UNLIKELY(!(expr))) { \
374 fprintf(stderr, "'%s' failed at %s:%u %s()\n", \
375 #expr , __FILE__, __LINE__, __func__); \
376 return; \
377 } \
378 } while(false)
379
380#define spa_return_val_if_fail(expr, val) \
381 do { \
382 if (SPA_UNLIKELY(!(expr))) { \
383 fprintf(stderr, "'%s' failed at %s:%u %s()\n", \
384 #expr , __FILE__, __LINE__, __func__); \
385 return (val); \
386 } \
387 } while(false)
388
389/* spa_assert_se() is an assert which guarantees side effects of x,
390 * i.e. is never optimized away, regardless of NDEBUG or FASTPATH. */
391#ifndef __COVERITY__
392#define spa_assert_se(expr) \
393 do { \
394 if (SPA_UNLIKELY(!(expr))) { \
395 fprintf(stderr, "'%s' failed at %s:%u %s()\n", \
396 #expr , __FILE__, __LINE__, __func__); \
397 abort(); \
398 } \
399 } while (false)
400#else
401#define spa_assert_se(expr) \
402 do { \
403 int _unique_var = (expr); \
404 if (!_unique_var) \
405 abort(); \
406 } while (false)
407#endif
408
409/* Does exactly nothing */
410#define spa_nop() do {} while (false)
411
412#ifdef NDEBUG
413#define spa_assert(expr) spa_nop()
414#elif defined (FASTPATH)
415#define spa_assert(expr) spa_assert_se(expr)
416#else
417#define spa_assert(expr) spa_assert_se(expr)
418#endif
419
420#ifdef NDEBUG
421#define spa_assert_not_reached() abort()
422#else
423#define spa_assert_not_reached() \
424 do { \
425 fprintf(stderr, "Code should not be reached at %s:%u %s()\n", \
426 __FILE__, __LINE__, __func__); \
427 abort(); \
428 } while (false)
429#endif
430
431#define spa_memzero(x,l) (memset((x), 0, (l)))
432#define spa_zero(x) (spa_memzero(&(x), sizeof(x)))
433
434#ifdef SPA_DEBUG_MEMCPY
435#define spa_memcpy(d,s,n) \
436({ \
437 fprintf(stderr, "%s:%u %s() memcpy(%p, %p, %zd)\n", \
438 __FILE__, __LINE__, __func__, (d), (s), (size_t)(n)); \
439 memcpy(d,s,n); \
440})
441#define spa_memmove(d,s,n) \
442({ \
443 fprintf(stderr, "%s:%u %s() memmove(%p, %p, %zd)\n", \
444 __FILE__, __LINE__, __func__, (d), (s), (size_t)(n)); \
445 memmove(d,s,n); \
446})
447#else
448#define spa_memcpy(d,s,n) memcpy(d,s,n)
449#define spa_memmove(d,s,n) memmove(d,s,n)
450#endif
451
452#define spa_aprintf(_fmt, ...) \
453({ \
454 char *_strp; \
455 if (asprintf(&(_strp), (_fmt), ## __VA_ARGS__ ) == -1) \
456 _strp = NULL; \
457 _strp; \
458})
459
460/**
461 * \}
462 */
463
464#ifdef __cplusplus
465} /* extern "C" */
466#endif
467
468#endif /* SPA_UTILS_DEFS_H */
spa_ptr_inside_and_aligned
SPA_API_UTILS_DEFS bool spa_ptr_inside_and_aligned(const void *p1, size_t s1, const void *p2, size_t s2, size_t align, size_t *remaining)
Definition defs.h:417
SPA_API_UTILS_DEFS
#define SPA_API_UTILS_DEFS
Definition defs.h:328
SPA_LIKELY
#define SPA_LIKELY(x)
Definition defs.h:396
spa_direction
spa_direction
Definition defs.h:106
spa_ptrinside
SPA_API_UTILS_DEFS bool spa_ptrinside(const void *p1, size_t s1, const void *p2, size_t s2, size_t *remaining)
Definition defs.h:402
SPA_IS_ALIGNED
#define SPA_IS_ALIGNED(p, align)
Definition defs.h:384
SPA_DIRECTION_INPUT
@ SPA_DIRECTION_INPUT
Definition defs.h:107
SPA_DIRECTION_OUTPUT
@ SPA_DIRECTION_OUTPUT
Definition defs.h:108
string.h
spa/utils/string.h
spa_error_location
Definition defs.h:443
spa_error_location::line
int line
Definition defs.h:444
spa_error_location::location
const char * location
Definition defs.h:447
spa_error_location::col
int col
Definition defs.h:445
spa_error_location::len
size_t len
Definition defs.h:446
spa_error_location::reason
const char * reason
Definition defs.h:448
spa_fraction
Definition defs.h:137
spa_fraction::num
uint32_t num
Definition defs.h:138
spa_fraction::denom
uint32_t denom
Definition defs.h:139
spa_point
Definition defs.h:123
spa_point::y
int32_t y
Definition defs.h:125
spa_point::x
int32_t x
Definition defs.h:124
spa_rectangle
Definition defs.h:116
spa_rectangle::width
uint32_t width
Definition defs.h:117
spa_rectangle::height
uint32_t height
Definition defs.h:118
spa_region
Definition defs.h:130
spa_region::position
struct spa_point position
Definition defs.h:131
spa_region::size
struct spa_rectangle size
Definition defs.h:132