poll-compat.h File Reference

#include "asterisk/select.h"
#include <poll.h>

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Go to the source code of this file.

Macros
#define	ast_poll(a, b, c)   poll(a, b, c)

Functions
int	ast_poll2 (struct pollfd *pArray, unsigned long n_fds, struct timeval *tv)
	Same as poll(2), except the time is specified in microseconds and the tv argument is modified to indicate the time remaining. More...
static int	ast_poll_fd_index (struct pollfd *haystack, int nfds, int needle)
	Shortcut for conversion of FD_ISSET to poll(2)-based. More...

Macro Definition Documentation

ast_poll

#define ast_poll	(		a,
			b,
			c
	)		poll(a, b, c)

Definition at line 88 of file poll-compat.h.

Function Documentation

ast_poll2()

int ast_poll2	(	struct pollfd *	pArray,
		unsigned long	n_fds,
		struct timeval *	tv
	)

Same as poll(2), except the time is specified in microseconds and the tv argument is modified to indicate the time remaining.

Definition at line 268 of file poll.c.

{
#if !defined(AST_POLL_COMPAT)
    struct timeval start = ast_tvnow();
#if defined(HAVE_PPOLL)
    struct timespec ts = { tv ? tv->tv_sec : 0, tv ? tv->tv_usec * 1000 : 0 };
    int res = ppoll(pArray, n_fds, tv ? &ts : NULL, NULL);
#else
    int res = poll(pArray, n_fds, tv ? tv->tv_sec * 1000 + tv->tv_usec / 1000 : -1);
#endif
    struct timeval after = ast_tvnow();
    if (res > 0 && tv && ast_tvdiff_ms(ast_tvadd(*tv, start), after) > 0) {
        *tv = ast_tvsub(*tv, ast_tvsub(after, start));
    } else if (res > 0 && tv) {
        *tv = ast_tv(0, 0);
    }
    return res;
#else
    ast_fdset read_descs, write_descs, except_descs;
    int ready_descriptors, max_fd = 0;
 
    FD_ZERO(&read_descs);
    FD_ZERO(&write_descs);
    FD_ZERO(&except_descs);
 
    if (pArray) {
        max_fd = map_poll_spec(pArray, n_fds, &read_descs, &write_descs, &except_descs);
    }
 
    ready_descriptors = ast_select(max_fd + 1, &read_descs, &write_descs, &except_descs, tv);
 
    if (ready_descriptors >= 0) {
        map_select_results(pArray, n_fds, &read_descs, &write_descs, &except_descs);
    }
 
    return ready_descriptors;
#endif
}

References ast_select(), ast_tv(), ast_tvadd(), ast_tvdiff_ms(), ast_tvnow(), ast_tvsub(), FD_ZERO, and NULL.

Referenced by AST_TEST_DEFINE().

ast_poll_fd_index()

static int ast_poll_fd_index ( struct pollfd *  haystack, int  nfds, int  needle  )

inlinestatic

Shortcut for conversion of FD_ISSET to poll(2)-based.

Definition at line 128 of file poll-compat.h.

{
    int i;
    for (i = 0; i < nfds; i++) {
        if (haystack[i].fd == needle) {
            return i;
        }
    }
    return -1;
}