mirror of
https://github.com/torvalds/linux
synced 2024-07-22 11:10:46 +00:00
de84da588f
In the previous code, the 'mds' and 'nrhandler' variables were not utilized in the codebase. Additionally, there was a potential NULL pointer dereference and memory leak due to improper handling of memory reallocation failure. This patch removes the unused 'mds' and 'nrhandler' variables along with the associated code, addressing the unused variable issue, NULL pointer dereference issue and the memory leak issue. Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20230926173736.1142420-1-visitorckw@gmail.com
105 lines
1.5 KiB
C
105 lines
1.5 KiB
C
// SPDX-License-Identifier: LGPL-2.1+
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// Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/epoll.h>
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#include "mainloop.h"
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#include "log.h"
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static int epfd = -1;
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static sig_atomic_t exit_mainloop;
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struct mainloop_data {
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mainloop_callback_t cb;
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void *data;
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int fd;
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};
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#define MAX_EVENTS 10
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int mainloop(unsigned int timeout)
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{
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int i, nfds;
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struct epoll_event events[MAX_EVENTS];
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struct mainloop_data *md;
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if (epfd < 0)
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return -1;
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for (;;) {
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nfds = epoll_wait(epfd, events, MAX_EVENTS, timeout);
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if (exit_mainloop || !nfds)
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return 0;
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if (nfds < 0) {
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if (errno == EINTR)
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continue;
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return -1;
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}
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for (i = 0; i < nfds; i++) {
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md = events[i].data.ptr;
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if (md->cb(md->fd, md->data) > 0)
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return 0;
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}
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}
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}
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int mainloop_add(int fd, mainloop_callback_t cb, void *data)
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{
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struct epoll_event ev = {
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.events = EPOLLIN,
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};
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struct mainloop_data *md;
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md = malloc(sizeof(*md));
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if (!md)
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return -1;
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md->data = data;
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md->cb = cb;
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md->fd = fd;
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ev.data.ptr = md;
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if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev) < 0) {
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free(md);
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return -1;
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}
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return 0;
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}
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int mainloop_del(int fd)
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{
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if (epoll_ctl(epfd, EPOLL_CTL_DEL, fd, NULL) < 0)
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return -1;
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return 0;
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}
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int mainloop_init(void)
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{
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epfd = epoll_create(2);
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if (epfd < 0)
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return -1;
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return 0;
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}
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void mainloop_exit(void)
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{
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exit_mainloop = 1;
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}
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void mainloop_fini(void)
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{
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close(epfd);
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}
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