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