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