Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef __API_FD_ARRAY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define __API_FD_ARRAY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) struct pollfd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * struct fdarray: Array of file descriptors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * @priv: Per array entry priv area, users should access just its contents,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  *	  not set it to anything, as it is kept in synch with @entries, being
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  *	  realloc'ed, * for instance, in fdarray__{grow,filter}.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  *	  I.e. using 'fda->priv[N].idx = * value' where N < fda->nr is ok,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  *	  but doing 'fda->priv = malloc(M)' is not allowed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct fdarray {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	int	       nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	int	       nr_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	int	       nr_autogrow;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	struct pollfd *entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	struct priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 			int    idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 			void   *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	} *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) enum fdarray_flags {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	fdarray_flag__default	    = 0x00000000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	fdarray_flag__nonfilterable = 0x00000001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) void fdarray__init(struct fdarray *fda, int nr_autogrow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) void fdarray__exit(struct fdarray *fda);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) void fdarray__delete(struct fdarray *fda);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int fdarray__add(struct fdarray *fda, int fd, short revents, enum fdarray_flags flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int fdarray__poll(struct fdarray *fda, int timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) int fdarray__filter(struct fdarray *fda, short revents,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		    void (*entry_destructor)(struct fdarray *fda, int fd, void *arg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		    void *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int fdarray__grow(struct fdarray *fda, int extra);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int fdarray__fprintf(struct fdarray *fda, FILE *fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static inline int fdarray__available_entries(struct fdarray *fda)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	return fda->nr_alloc - fda->nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #endif /* __API_FD_ARRAY__ */