/* 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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