| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __API_FD_ARRAY__ |
| #define __API_FD_ARRAY__ |
| |
| #include <stdio.h> |
| |
| struct pollfd; |
| |
| /** |
| * struct fdarray: Array of file descriptors |
| * |
| * @priv: Per array entry priv area, users should access just its contents, |
| * not set it to anything, as it is kept in synch with @entries, being |
| * realloc'ed, * for instance, in fdarray__{grow,filter}. |
| * |
| * I.e. using 'fda->priv[N].idx = * value' where N < fda->nr is ok, |
| * but doing 'fda->priv = malloc(M)' is not allowed. |
| */ |
| struct fdarray { |
| int nr; |
| int nr_alloc; |
| int nr_autogrow; |
| struct pollfd *entries; |
| struct priv { |
| union { |
| int idx; |
| void *ptr; |
| }; |
| unsigned int flags; |
| } *priv; |
| }; |
| |
| enum fdarray_flags { |
| fdarray_flag__default = 0x00000000, |
| fdarray_flag__nonfilterable = 0x00000001 |
| }; |
| |
| void fdarray__init(struct fdarray *fda, int nr_autogrow); |
| void fdarray__exit(struct fdarray *fda); |
| |
| struct fdarray *fdarray__new(int nr_alloc, int nr_autogrow); |
| void fdarray__delete(struct fdarray *fda); |
| |
| int fdarray__add(struct fdarray *fda, int fd, short revents, enum fdarray_flags flags); |
| int fdarray__dup_entry_from(struct fdarray *fda, int pos, struct fdarray *from); |
| int fdarray__poll(struct fdarray *fda, int timeout); |
| int fdarray__filter(struct fdarray *fda, short revents, |
| void (*entry_destructor)(struct fdarray *fda, int fd, void *arg), |
| void *arg); |
| int fdarray__grow(struct fdarray *fda, int extra); |
| int fdarray__fprintf(struct fdarray *fda, FILE *fp); |
| |
| static inline int fdarray__available_entries(struct fdarray *fda) |
| { |
| return fda->nr_alloc - fda->nr; |
| } |
| |
| #endif /* __API_FD_ARRAY__ */ |