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author | 2016-10-07 14:14:08 +0200 | |
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committer | 2016-10-07 14:14:08 +0200 | |
commit | 85f4741fcf642f52ac4fa56f0aff1728727c901b (patch) | |
tree | da8cca02913839152d2eb04c0e85a83018bcaed3 /3rdparty/libuv/src/win/signal.c | |
parent | ff01b716711b97c2fcaa709ea97f7650f106aa10 (diff) |
Remove libuv library (nw)
Diffstat (limited to '3rdparty/libuv/src/win/signal.c')
-rw-r--r-- | 3rdparty/libuv/src/win/signal.c | 356 |
1 files changed, 0 insertions, 356 deletions
diff --git a/3rdparty/libuv/src/win/signal.c b/3rdparty/libuv/src/win/signal.c deleted file mode 100644 index 2c64a55dc39..00000000000 --- a/3rdparty/libuv/src/win/signal.c +++ /dev/null @@ -1,356 +0,0 @@ -/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. - * 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 <assert.h> -#include <signal.h> - -#include "uv.h" -#include "internal.h" -#include "handle-inl.h" -#include "req-inl.h" - - -RB_HEAD(uv_signal_tree_s, uv_signal_s); - -static struct uv_signal_tree_s uv__signal_tree = RB_INITIALIZER(uv__signal_tree); -static ssize_t volatile uv__signal_control_handler_refs = 0; -static CRITICAL_SECTION uv__signal_lock; - - -void uv_signals_init() { - InitializeCriticalSection(&uv__signal_lock); -} - - -static int uv__signal_compare(uv_signal_t* w1, uv_signal_t* w2) { - /* Compare signums first so all watchers with the same signnum end up */ - /* adjacent. */ - if (w1->signum < w2->signum) return -1; - if (w1->signum > w2->signum) return 1; - - /* Sort by loop pointer, so we can easily look up the first item after */ - /* { .signum = x, .loop = NULL } */ - if ((uintptr_t) w1->loop < (uintptr_t) w2->loop) return -1; - if ((uintptr_t) w1->loop > (uintptr_t) w2->loop) return 1; - - if ((uintptr_t) w1 < (uintptr_t) w2) return -1; - if ((uintptr_t) w1 > (uintptr_t) w2) return 1; - - return 0; -} - - -RB_GENERATE_STATIC(uv_signal_tree_s, uv_signal_s, tree_entry, uv__signal_compare); - - -/* - * Dispatches signal {signum} to all active uv_signal_t watchers in all loops. - * Returns 1 if the signal was dispatched to any watcher, or 0 if there were - * no active signal watchers observing this signal. - */ -int uv__signal_dispatch(int signum) { - uv_signal_t lookup; - uv_signal_t* handle; - int dispatched = 0; - - EnterCriticalSection(&uv__signal_lock); - - lookup.signum = signum; - lookup.loop = NULL; - - for (handle = RB_NFIND(uv_signal_tree_s, &uv__signal_tree, &lookup); - handle != NULL && handle->signum == signum; - handle = RB_NEXT(uv_signal_tree_s, &uv__signal_tree, handle)) { - unsigned long previous = InterlockedExchange( - (volatile LONG*) &handle->pending_signum, signum); - - if (!previous) { - POST_COMPLETION_FOR_REQ(handle->loop, &handle->signal_req); - } - - dispatched = 1; - } - - LeaveCriticalSection(&uv__signal_lock); - - return dispatched; -} - - -static BOOL WINAPI uv__signal_control_handler(DWORD type) { - switch (type) { - case CTRL_C_EVENT: - return uv__signal_dispatch(SIGINT); - - case CTRL_BREAK_EVENT: - return uv__signal_dispatch(SIGBREAK); - - case CTRL_CLOSE_EVENT: - if (uv__signal_dispatch(SIGHUP)) { - /* Windows will terminate the process after the control handler */ - /* returns. After that it will just terminate our process. Therefore */ - /* block the signal handler so the main loop has some time to pick */ - /* up the signal and do something for a few seconds. */ - Sleep(INFINITE); - return TRUE; - } - return FALSE; - - case CTRL_LOGOFF_EVENT: - case CTRL_SHUTDOWN_EVENT: - /* These signals are only sent to services. Services have their own */ - /* notification mechanism, so there's no point in handling these. */ - - default: - /* We don't handle these. */ - return FALSE; - } -} - - -static int uv__signal_register_control_handler() { - /* When this function is called, the uv__signal_lock must be held. */ - - /* If the console control handler has already been hooked, just add a */ - /* reference. */ - if (uv__signal_control_handler_refs > 0) { - uv__signal_control_handler_refs++; - return 0; - } - - if (!SetConsoleCtrlHandler(uv__signal_control_handler, TRUE)) - return GetLastError(); - - uv__signal_control_handler_refs++; - - return 0; -} - - -static void uv__signal_unregister_control_handler() { - /* When this function is called, the uv__signal_lock must be held. */ - BOOL r; - - /* Don't unregister if the number of console control handlers exceeds one. */ - /* Just remove a reference in that case. */ - if (uv__signal_control_handler_refs > 1) { - uv__signal_control_handler_refs--; - return; - } - - assert(uv__signal_control_handler_refs == 1); - - r = SetConsoleCtrlHandler(uv__signal_control_handler, FALSE); - /* This should never fail; if it does it is probably a bug in libuv. */ - assert(r); - - uv__signal_control_handler_refs--; -} - - -static int uv__signal_register(int signum) { - switch (signum) { - case SIGINT: - case SIGBREAK: - case SIGHUP: - return uv__signal_register_control_handler(); - - case SIGWINCH: - /* SIGWINCH is generated in tty.c. No need to register anything. */ - return 0; - - case SIGILL: - case SIGABRT_COMPAT: - case SIGFPE: - case SIGSEGV: - case SIGTERM: - case SIGABRT: - /* Signal is never raised. */ - return 0; - - default: - /* Invalid signal. */ - return ERROR_INVALID_PARAMETER; - } -} - - -static void uv__signal_unregister(int signum) { - switch (signum) { - case SIGINT: - case SIGBREAK: - case SIGHUP: - uv__signal_unregister_control_handler(); - return; - - case SIGWINCH: - /* SIGWINCH is generated in tty.c. No need to unregister anything. */ - return; - - case SIGILL: - case SIGABRT_COMPAT: - case SIGFPE: - case SIGSEGV: - case SIGTERM: - case SIGABRT: - /* Nothing is registered for this signal. */ - return; - - default: - /* Libuv bug. */ - assert(0 && "Invalid signum"); - return; - } -} - - -int uv_signal_init(uv_loop_t* loop, uv_signal_t* handle) { - uv_req_t* req; - - uv__handle_init(loop, (uv_handle_t*) handle, UV_SIGNAL); - handle->pending_signum = 0; - handle->signum = 0; - handle->signal_cb = NULL; - - req = &handle->signal_req; - uv_req_init(loop, req); - req->type = UV_SIGNAL_REQ; - req->data = handle; - - return 0; -} - - -int uv_signal_stop(uv_signal_t* handle) { - uv_signal_t* removed_handle; - - /* If the watcher wasn't started, this is a no-op. */ - if (handle->signum == 0) - return 0; - - EnterCriticalSection(&uv__signal_lock); - - uv__signal_unregister(handle->signum); - - removed_handle = RB_REMOVE(uv_signal_tree_s, &uv__signal_tree, handle); - assert(removed_handle == handle); - - LeaveCriticalSection(&uv__signal_lock); - - handle->signum = 0; - uv__handle_stop(handle); - - return 0; -} - - -int uv_signal_start(uv_signal_t* handle, uv_signal_cb signal_cb, int signum) { - int err; - - /* If the user supplies signum == 0, then return an error already. If the */ - /* signum is otherwise invalid then uv__signal_register will find out */ - /* eventually. */ - if (signum == 0) { - return UV_EINVAL; - } - - /* Short circuit: if the signal watcher is already watching {signum} don't */ - /* go through the process of deregistering and registering the handler. */ - /* Additionally, this avoids pending signals getting lost in the (small) */ - /* time frame that handle->signum == 0. */ - if (signum == handle->signum) { - handle->signal_cb = signal_cb; - return 0; - } - - /* If the signal handler was already active, stop it first. */ - if (handle->signum != 0) { - int r = uv_signal_stop(handle); - /* uv_signal_stop is infallible. */ - assert(r == 0); - } - - EnterCriticalSection(&uv__signal_lock); - - err = uv__signal_register(signum); - if (err) { - /* Uh-oh, didn't work. */ - LeaveCriticalSection(&uv__signal_lock); - return uv_translate_sys_error(err); - } - - handle->signum = signum; - RB_INSERT(uv_signal_tree_s, &uv__signal_tree, handle); - - LeaveCriticalSection(&uv__signal_lock); - - handle->signal_cb = signal_cb; - uv__handle_start(handle); - - return 0; -} - - -void uv_process_signal_req(uv_loop_t* loop, uv_signal_t* handle, - uv_req_t* req) { - long dispatched_signum; - - assert(handle->type == UV_SIGNAL); - assert(req->type == UV_SIGNAL_REQ); - - dispatched_signum = InterlockedExchange( - (volatile LONG*) &handle->pending_signum, 0); - assert(dispatched_signum != 0); - - /* Check if the pending signal equals the signum that we are watching for. */ - /* These can get out of sync when the handler is stopped and restarted */ - /* while the signal_req is pending. */ - if (dispatched_signum == handle->signum) - handle->signal_cb(handle, dispatched_signum); - - if (handle->flags & UV__HANDLE_CLOSING) { - /* When it is closing, it must be stopped at this point. */ - assert(handle->signum == 0); - uv_want_endgame(loop, (uv_handle_t*) handle); - } -} - - -void uv_signal_close(uv_loop_t* loop, uv_signal_t* handle) { - uv_signal_stop(handle); - uv__handle_closing(handle); - - if (handle->pending_signum == 0) { - uv_want_endgame(loop, (uv_handle_t*) handle); - } -} - - -void uv_signal_endgame(uv_loop_t* loop, uv_signal_t* handle) { - assert(handle->flags & UV__HANDLE_CLOSING); - assert(!(handle->flags & UV_HANDLE_CLOSED)); - - assert(handle->signum == 0); - assert(handle->pending_signum == 0); - - handle->flags |= UV_HANDLE_CLOSED; - - uv__handle_close(handle); -} |