diff options
Diffstat (limited to 'qemu/iohandler.c')
-rw-r--r-- | qemu/iohandler.c | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/qemu/iohandler.c b/qemu/iohandler.c deleted file mode 100644 index f2fc8a9bd..000000000 --- a/qemu/iohandler.c +++ /dev/null @@ -1,128 +0,0 @@ -/* - * QEMU System Emulator - managing I/O handler - * - * Copyright (c) 2003-2008 Fabrice Bellard - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "qemu/osdep.h" -#include "qapi/error.h" -#include "qemu-common.h" -#include "qemu/queue.h" -#include "block/aio.h" -#include "qemu/main-loop.h" - -#ifndef _WIN32 -#include <sys/wait.h> -#endif - -/* This context runs on top of main loop. We can't reuse qemu_aio_context - * because iohandlers mustn't be polled by aio_poll(qemu_aio_context). */ -static AioContext *iohandler_ctx; - -static void iohandler_init(void) -{ - if (!iohandler_ctx) { - iohandler_ctx = aio_context_new(&error_abort); - } -} - -AioContext *iohandler_get_aio_context(void) -{ - iohandler_init(); - return iohandler_ctx; -} - -GSource *iohandler_get_g_source(void) -{ - iohandler_init(); - return aio_get_g_source(iohandler_ctx); -} - -void qemu_set_fd_handler(int fd, - IOHandler *fd_read, - IOHandler *fd_write, - void *opaque) -{ - iohandler_init(); - aio_set_fd_handler(iohandler_ctx, fd, false, - fd_read, fd_write, opaque); -} - -/* reaping of zombies. right now we're not passing the status to - anyone, but it would be possible to add a callback. */ -#ifndef _WIN32 -typedef struct ChildProcessRecord { - int pid; - QLIST_ENTRY(ChildProcessRecord) next; -} ChildProcessRecord; - -static QLIST_HEAD(, ChildProcessRecord) child_watches = - QLIST_HEAD_INITIALIZER(child_watches); - -static QEMUBH *sigchld_bh; - -static void sigchld_handler(int signal) -{ - qemu_bh_schedule(sigchld_bh); -} - -static void sigchld_bh_handler(void *opaque) -{ - ChildProcessRecord *rec, *next; - - QLIST_FOREACH_SAFE(rec, &child_watches, next, next) { - if (waitpid(rec->pid, NULL, WNOHANG) == rec->pid) { - QLIST_REMOVE(rec, next); - g_free(rec); - } - } -} - -static void qemu_init_child_watch(void) -{ - struct sigaction act; - sigchld_bh = qemu_bh_new(sigchld_bh_handler, NULL); - - memset(&act, 0, sizeof(act)); - act.sa_handler = sigchld_handler; - act.sa_flags = SA_NOCLDSTOP; - sigaction(SIGCHLD, &act, NULL); -} - -int qemu_add_child_watch(pid_t pid) -{ - ChildProcessRecord *rec; - - if (!sigchld_bh) { - qemu_init_child_watch(); - } - - QLIST_FOREACH(rec, &child_watches, next) { - if (rec->pid == pid) { - return 1; - } - } - rec = g_malloc0(sizeof(ChildProcessRecord)); - rec->pid = pid; - QLIST_INSERT_HEAD(&child_watches, rec, next); - return 0; -} -#endif |