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-rw-r--r--libcutils/fdevent.c506
1 files changed, 0 insertions, 506 deletions
diff --git a/libcutils/fdevent.c b/libcutils/fdevent.c
deleted file mode 100644
index 4cf46faf7..000000000
--- a/libcutils/fdevent.c
+++ /dev/null
@@ -1,506 +0,0 @@
-/* http://frotznet.googlecode.com/svn/trunk/utils/fdevent.c
-**
-** Copyright 2006, Brian Swetland <swetland@frotz.net>
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-** http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-
-#include <fcntl.h>
-
-#include <stdarg.h>
-#include <stddef.h>
-
-#include <cutils/fdevent.h>
-
-#define TRACE(x...) fprintf(stderr,x)
-
-#define DEBUG 0
-
-static void fatal(const char *fn, const char *fmt, ...)
-{
- va_list ap;
- va_start(ap, fmt);
- fprintf(stderr, "%s:", fn);
- vfprintf(stderr, fmt, ap);
- va_end(ap);
- abort();
-}
-
-#define FATAL(x...) fatal(__FUNCTION__, x)
-
-#if DEBUG
-static void dump_fde(fdevent *fde, const char *info)
-{
- fprintf(stderr,"FDE #%03d %c%c%c %s\n", fde->fd,
- fde->state & FDE_READ ? 'R' : ' ',
- fde->state & FDE_WRITE ? 'W' : ' ',
- fde->state & FDE_ERROR ? 'E' : ' ',
- info);
-}
-#else
-#define dump_fde(fde, info) do { } while(0)
-#endif
-
-#define FDE_EVENTMASK 0x00ff
-#define FDE_STATEMASK 0xff00
-
-#define FDE_ACTIVE 0x0100
-#define FDE_PENDING 0x0200
-#define FDE_CREATED 0x0400
-
-static void fdevent_plist_enqueue(fdevent *node);
-static void fdevent_plist_remove(fdevent *node);
-static fdevent *fdevent_plist_dequeue(void);
-
-static fdevent list_pending = {
- .next = &list_pending,
- .prev = &list_pending,
-};
-
-static fdevent **fd_table = 0;
-static int fd_table_max = 0;
-
-#ifdef CRAPTASTIC
-//HAVE_EPOLL
-
-#include <sys/epoll.h>
-
-static int epoll_fd = -1;
-
-static void fdevent_init()
-{
- /* XXX: what's a good size for the passed in hint? */
- epoll_fd = epoll_create(256);
-
- if(epoll_fd < 0) {
- perror("epoll_create() failed");
- exit(1);
- }
-
- /* mark for close-on-exec */
- fcntl(epoll_fd, F_SETFD, FD_CLOEXEC);
-}
-
-static void fdevent_connect(fdevent *fde)
-{
- struct epoll_event ev;
-
- memset(&ev, 0, sizeof(ev));
- ev.events = 0;
- ev.data.ptr = fde;
-
-#if 0
- if(epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fde->fd, &ev)) {
- perror("epoll_ctl() failed\n");
- exit(1);
- }
-#endif
-}
-
-static void fdevent_disconnect(fdevent *fde)
-{
- struct epoll_event ev;
-
- memset(&ev, 0, sizeof(ev));
- ev.events = 0;
- ev.data.ptr = fde;
-
- /* technically we only need to delete if we
- ** were actively monitoring events, but let's
- ** be aggressive and do it anyway, just in case
- ** something's out of sync
- */
- epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fde->fd, &ev);
-}
-
-static void fdevent_update(fdevent *fde, unsigned events)
-{
- struct epoll_event ev;
- int active;
-
- active = (fde->state & FDE_EVENTMASK) != 0;
-
- memset(&ev, 0, sizeof(ev));
- ev.events = 0;
- ev.data.ptr = fde;
-
- if(events & FDE_READ) ev.events |= EPOLLIN;
- if(events & FDE_WRITE) ev.events |= EPOLLOUT;
- if(events & FDE_ERROR) ev.events |= (EPOLLERR | EPOLLHUP);
-
- fde->state = (fde->state & FDE_STATEMASK) | events;
-
- if(active) {
- /* we're already active. if we're changing to *no*
- ** events being monitored, we need to delete, otherwise
- ** we need to just modify
- */
- if(ev.events) {
- if(epoll_ctl(epoll_fd, EPOLL_CTL_MOD, fde->fd, &ev)) {
- perror("epoll_ctl() failed\n");
- exit(1);
- }
- } else {
- if(epoll_ctl(epoll_fd, EPOLL_CTL_DEL, fde->fd, &ev)) {
- perror("epoll_ctl() failed\n");
- exit(1);
- }
- }
- } else {
- /* we're not active. if we're watching events, we need
- ** to add, otherwise we can just do nothing
- */
- if(ev.events) {
- if(epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fde->fd, &ev)) {
- perror("epoll_ctl() failed\n");
- exit(1);
- }
- }
- }
-}
-
-static void fdevent_process()
-{
- struct epoll_event events[256];
- fdevent *fde;
- int i, n;
-
- n = epoll_wait(epoll_fd, events, 256, -1);
-
- if(n < 0) {
- if(errno == EINTR) return;
- perror("epoll_wait");
- exit(1);
- }
-
- for(i = 0; i < n; i++) {
- struct epoll_event *ev = events + i;
- fde = ev->data.ptr;
-
- if(ev->events & EPOLLIN) {
- fde->events |= FDE_READ;
- }
- if(ev->events & EPOLLOUT) {
- fde->events |= FDE_WRITE;
- }
- if(ev->events & (EPOLLERR | EPOLLHUP)) {
- fde->events |= FDE_ERROR;
- }
- if(fde->events) {
- if(fde->state & FDE_PENDING) continue;
- fde->state |= FDE_PENDING;
- fdevent_plist_enqueue(fde);
- }
- }
-}
-
-#else /* USE_SELECT */
-
-#ifdef HAVE_WINSOCK
-#include <winsock2.h>
-#else
-#include <sys/select.h>
-#endif
-
-static fd_set read_fds;
-static fd_set write_fds;
-static fd_set error_fds;
-
-static int select_n = 0;
-
-static void fdevent_init(void)
-{
- FD_ZERO(&read_fds);
- FD_ZERO(&write_fds);
- FD_ZERO(&error_fds);
-}
-
-static void fdevent_connect(fdevent *fde)
-{
- if(fde->fd >= select_n) {
- select_n = fde->fd + 1;
- }
-}
-
-static void fdevent_disconnect(fdevent *fde)
-{
- int i, n;
-
- FD_CLR(fde->fd, &read_fds);
- FD_CLR(fde->fd, &write_fds);
- FD_CLR(fde->fd, &error_fds);
-
- for(n = 0, i = 0; i < select_n; i++) {
- if(fd_table[i] != 0) n = i;
- }
- select_n = n + 1;
-}
-
-static void fdevent_update(fdevent *fde, unsigned events)
-{
- if(events & FDE_READ) {
- FD_SET(fde->fd, &read_fds);
- } else {
- FD_CLR(fde->fd, &read_fds);
- }
- if(events & FDE_WRITE) {
- FD_SET(fde->fd, &write_fds);
- } else {
- FD_CLR(fde->fd, &write_fds);
- }
- if(events & FDE_ERROR) {
- FD_SET(fde->fd, &error_fds);
- } else {
- FD_CLR(fde->fd, &error_fds);
- }
-
- fde->state = (fde->state & FDE_STATEMASK) | events;
-}
-
-static void fdevent_process()
-{
- int i, n;
- fdevent *fde;
- unsigned events;
- fd_set rfd, wfd, efd;
-
- memcpy(&rfd, &read_fds, sizeof(fd_set));
- memcpy(&wfd, &write_fds, sizeof(fd_set));
- memcpy(&efd, &error_fds, sizeof(fd_set));
-
- n = select(select_n, &rfd, &wfd, &efd, 0);
-
- if(n < 0) {
- if(errno == EINTR) return;
- perror("select");
- return;
- }
-
- for(i = 0; (i < select_n) && (n > 0); i++) {
- events = 0;
- if(FD_ISSET(i, &rfd)) events |= FDE_READ;
- if(FD_ISSET(i, &wfd)) events |= FDE_WRITE;
- if(FD_ISSET(i, &efd)) events |= FDE_ERROR;
-
- if(events) {
- n--;
-
- fde = fd_table[i];
- if(fde == 0) FATAL("missing fde for fd %d\n", i);
-
- fde->events |= events;
-
- if(fde->state & FDE_PENDING) continue;
- fde->state |= FDE_PENDING;
- fdevent_plist_enqueue(fde);
- }
- }
-}
-
-#endif
-
-static void fdevent_register(fdevent *fde)
-{
- if(fde->fd < 0) {
- FATAL("bogus negative fd (%d)\n", fde->fd);
- }
-
- if(fde->fd >= fd_table_max) {
- int oldmax = fd_table_max;
- if(fde->fd > 32000) {
- FATAL("bogus huuuuge fd (%d)\n", fde->fd);
- }
- if(fd_table_max == 0) {
- fdevent_init();
- fd_table_max = 256;
- }
- while(fd_table_max <= fde->fd) {
- fd_table_max *= 2;
- }
- fd_table = realloc(fd_table, sizeof(fdevent*) * fd_table_max);
- if(fd_table == 0) {
- FATAL("could not expand fd_table to %d entries\n", fd_table_max);
- }
- memset(fd_table + oldmax, 0, sizeof(int) * (fd_table_max - oldmax));
- }
-
- fd_table[fde->fd] = fde;
-}
-
-static void fdevent_unregister(fdevent *fde)
-{
- if((fde->fd < 0) || (fde->fd >= fd_table_max)) {
- FATAL("fd out of range (%d)\n", fde->fd);
- }
-
- if(fd_table[fde->fd] != fde) {
- FATAL("fd_table out of sync");
- }
-
- fd_table[fde->fd] = 0;
-
- if(!(fde->state & FDE_DONT_CLOSE)) {
- dump_fde(fde, "close");
- close(fde->fd);
- }
-}
-
-static void fdevent_plist_enqueue(fdevent *node)
-{
- fdevent *list = &list_pending;
-
- node->next = list;
- node->prev = list->prev;
- node->prev->next = node;
- list->prev = node;
-}
-
-static void fdevent_plist_remove(fdevent *node)
-{
- node->prev->next = node->next;
- node->next->prev = node->prev;
- node->next = 0;
- node->prev = 0;
-}
-
-static fdevent *fdevent_plist_dequeue(void)
-{
- fdevent *list = &list_pending;
- fdevent *node = list->next;
-
- if(node == list) return 0;
-
- list->next = node->next;
- list->next->prev = list;
- node->next = 0;
- node->prev = 0;
-
- return node;
-}
-
-fdevent *fdevent_create(int fd, fd_func func, void *arg)
-{
- fdevent *fde = (fdevent*) malloc(sizeof(fdevent));
- if(fde == 0) return 0;
- fdevent_install(fde, fd, func, arg);
- fde->state |= FDE_CREATED;
- return fde;
-}
-
-void fdevent_destroy(fdevent *fde)
-{
- if(fde == 0) return;
- if(!(fde->state & FDE_CREATED)) {
- FATAL("fde %p not created by fdevent_create()\n", fde);
- }
- fdevent_remove(fde);
-}
-
-void fdevent_install(fdevent *fde, int fd, fd_func func, void *arg)
-{
- memset(fde, 0, sizeof(fdevent));
- fde->state = FDE_ACTIVE;
- fde->fd = fd;
- fde->func = func;
- fde->arg = arg;
-
-#ifndef HAVE_WINSOCK
- fcntl(fd, F_SETFL, O_NONBLOCK);
-#endif
- fdevent_register(fde);
- dump_fde(fde, "connect");
- fdevent_connect(fde);
- fde->state |= FDE_ACTIVE;
-}
-
-void fdevent_remove(fdevent *fde)
-{
- if(fde->state & FDE_PENDING) {
- fdevent_plist_remove(fde);
- }
-
- if(fde->state & FDE_ACTIVE) {
- fdevent_disconnect(fde);
- dump_fde(fde, "disconnect");
- fdevent_unregister(fde);
- }
-
- fde->state = 0;
- fde->events = 0;
-}
-
-
-void fdevent_set(fdevent *fde, unsigned events)
-{
- events &= FDE_EVENTMASK;
-
- if((fde->state & FDE_EVENTMASK) == events) return;
-
- if(fde->state & FDE_ACTIVE) {
- fdevent_update(fde, events);
- dump_fde(fde, "update");
- }
-
- fde->state = (fde->state & FDE_STATEMASK) | events;
-
- if(fde->state & FDE_PENDING) {
- /* if we're pending, make sure
- ** we don't signal an event that
- ** is no longer wanted.
- */
- fde->events &= (~events);
- if(fde->events == 0) {
- fdevent_plist_remove(fde);
- fde->state &= (~FDE_PENDING);
- }
- }
-}
-
-void fdevent_add(fdevent *fde, unsigned events)
-{
- fdevent_set(
- fde, (fde->state & FDE_EVENTMASK) | (events & FDE_EVENTMASK));
-}
-
-void fdevent_del(fdevent *fde, unsigned events)
-{
- fdevent_set(
- fde, (fde->state & FDE_EVENTMASK) & (~(events & FDE_EVENTMASK)));
-}
-
-void fdevent_loop()
-{
- fdevent *fde;
-
- for(;;) {
-#if DEBUG
- fprintf(stderr,"--- ---- waiting for events\n");
-#endif
- fdevent_process();
-
- while((fde = fdevent_plist_dequeue())) {
- unsigned events = fde->events;
- fde->events = 0;
- fde->state &= (~FDE_PENDING);
- dump_fde(fde, "callback");
- fde->func(fde->fd, events, fde->arg);
- }
- }
-}
-
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