mirror of
https://github.com/freebsd/freebsd-src
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295 lines
7.5 KiB
C
295 lines
7.5 KiB
C
/*
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* Copyright (c) 2009-2012 Niels Provos, Nick Mathewson
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "evconfig-private.h"
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#ifndef _WIN32_WINNT
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/* Minimum required for InitializeCriticalSectionAndSpinCount */
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#define _WIN32_WINNT 0x0403
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#endif
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#include <winsock2.h>
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#include <windows.h>
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#include <process.h>
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#include <stdio.h>
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#include <mswsock.h>
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#include "event2/util.h"
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#include "util-internal.h"
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#include "iocp-internal.h"
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#include "log-internal.h"
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#include "mm-internal.h"
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#include "event-internal.h"
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#include "evthread-internal.h"
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#define NOTIFICATION_KEY ((ULONG_PTR)-1)
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void
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event_overlapped_init_(struct event_overlapped *o, iocp_callback cb)
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{
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memset(o, 0, sizeof(struct event_overlapped));
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o->cb = cb;
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}
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static void
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handle_entry(OVERLAPPED *o, ULONG_PTR completion_key, DWORD nBytes, int ok)
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{
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struct event_overlapped *eo =
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EVUTIL_UPCAST(o, struct event_overlapped, overlapped);
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eo->cb(eo, completion_key, nBytes, ok);
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}
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static void
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loop(void *port_)
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{
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struct event_iocp_port *port = port_;
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long ms = port->ms;
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HANDLE p = port->port;
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if (ms <= 0)
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ms = INFINITE;
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while (1) {
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OVERLAPPED *overlapped=NULL;
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ULONG_PTR key=0;
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DWORD bytes=0;
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int ok = GetQueuedCompletionStatus(p, &bytes, &key,
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&overlapped, ms);
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EnterCriticalSection(&port->lock);
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if (port->shutdown) {
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if (--port->n_live_threads == 0)
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ReleaseSemaphore(port->shutdownSemaphore, 1,
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NULL);
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LeaveCriticalSection(&port->lock);
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return;
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}
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LeaveCriticalSection(&port->lock);
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if (key != NOTIFICATION_KEY && overlapped)
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handle_entry(overlapped, key, bytes, ok);
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else if (!overlapped)
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break;
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}
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event_warnx("GetQueuedCompletionStatus exited with no event.");
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EnterCriticalSection(&port->lock);
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if (--port->n_live_threads == 0)
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ReleaseSemaphore(port->shutdownSemaphore, 1, NULL);
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LeaveCriticalSection(&port->lock);
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}
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int
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event_iocp_port_associate_(struct event_iocp_port *port, evutil_socket_t fd,
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ev_uintptr_t key)
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{
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HANDLE h;
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h = CreateIoCompletionPort((HANDLE)fd, port->port, key, port->n_threads);
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if (!h)
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return -1;
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return 0;
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}
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static void *
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get_extension_function(SOCKET s, const GUID *which_fn)
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{
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void *ptr = NULL;
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DWORD bytes=0;
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WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER,
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(GUID*)which_fn, sizeof(*which_fn),
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&ptr, sizeof(ptr),
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&bytes, NULL, NULL);
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/* No need to detect errors here: if ptr is set, then we have a good
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function pointer. Otherwise, we should behave as if we had no
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function pointer.
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*/
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return ptr;
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}
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/* Mingw doesn't have these in its mswsock.h. The values are copied from
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wine.h. Perhaps if we copy them exactly, the cargo will come again.
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*/
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#ifndef WSAID_ACCEPTEX
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#define WSAID_ACCEPTEX \
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{0xb5367df1,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}}
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#endif
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#ifndef WSAID_CONNECTEX
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#define WSAID_CONNECTEX \
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{0x25a207b9,0xddf3,0x4660,{0x8e,0xe9,0x76,0xe5,0x8c,0x74,0x06,0x3e}}
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#endif
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#ifndef WSAID_GETACCEPTEXSOCKADDRS
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#define WSAID_GETACCEPTEXSOCKADDRS \
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{0xb5367df2,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}}
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#endif
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static int extension_fns_initialized = 0;
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static void
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init_extension_functions(struct win32_extension_fns *ext)
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{
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const GUID acceptex = WSAID_ACCEPTEX;
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const GUID connectex = WSAID_CONNECTEX;
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const GUID getacceptexsockaddrs = WSAID_GETACCEPTEXSOCKADDRS;
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SOCKET s = socket(AF_INET, SOCK_STREAM, 0);
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if (s == INVALID_SOCKET)
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return;
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ext->AcceptEx = get_extension_function(s, &acceptex);
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ext->ConnectEx = get_extension_function(s, &connectex);
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ext->GetAcceptExSockaddrs = get_extension_function(s,
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&getacceptexsockaddrs);
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closesocket(s);
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extension_fns_initialized = 1;
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}
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static struct win32_extension_fns the_extension_fns;
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const struct win32_extension_fns *
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event_get_win32_extension_fns_(void)
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{
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return &the_extension_fns;
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}
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#define N_CPUS_DEFAULT 2
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struct event_iocp_port *
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event_iocp_port_launch_(int n_cpus)
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{
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struct event_iocp_port *port;
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int i;
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if (!extension_fns_initialized)
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init_extension_functions(&the_extension_fns);
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if (!(port = mm_calloc(1, sizeof(struct event_iocp_port))))
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return NULL;
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if (n_cpus <= 0)
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n_cpus = N_CPUS_DEFAULT;
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port->n_threads = n_cpus * 2;
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port->threads = mm_calloc(port->n_threads, sizeof(HANDLE));
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if (!port->threads)
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goto err;
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port->port = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0,
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n_cpus);
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port->ms = -1;
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if (!port->port)
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goto err;
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port->shutdownSemaphore = CreateSemaphore(NULL, 0, 1, NULL);
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if (!port->shutdownSemaphore)
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goto err;
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for (i=0; i<port->n_threads; ++i) {
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ev_uintptr_t th = _beginthread(loop, 0, port);
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if (th == (ev_uintptr_t)-1)
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goto err;
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port->threads[i] = (HANDLE)th;
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++port->n_live_threads;
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}
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InitializeCriticalSectionAndSpinCount(&port->lock, 1000);
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return port;
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err:
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if (port->port)
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CloseHandle(port->port);
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if (port->threads)
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mm_free(port->threads);
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if (port->shutdownSemaphore)
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CloseHandle(port->shutdownSemaphore);
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mm_free(port);
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return NULL;
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}
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static void
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event_iocp_port_unlock_and_free_(struct event_iocp_port *port)
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{
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DeleteCriticalSection(&port->lock);
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CloseHandle(port->port);
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CloseHandle(port->shutdownSemaphore);
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mm_free(port->threads);
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mm_free(port);
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}
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static int
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event_iocp_notify_all(struct event_iocp_port *port)
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{
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int i, r, ok=1;
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for (i=0; i<port->n_threads; ++i) {
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r = PostQueuedCompletionStatus(port->port, 0, NOTIFICATION_KEY,
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NULL);
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if (!r)
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ok = 0;
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}
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return ok ? 0 : -1;
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}
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int
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event_iocp_shutdown_(struct event_iocp_port *port, long waitMsec)
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{
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DWORD ms = INFINITE;
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int n;
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EnterCriticalSection(&port->lock);
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port->shutdown = 1;
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LeaveCriticalSection(&port->lock);
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event_iocp_notify_all(port);
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if (waitMsec >= 0)
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ms = waitMsec;
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WaitForSingleObject(port->shutdownSemaphore, ms);
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EnterCriticalSection(&port->lock);
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n = port->n_live_threads;
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LeaveCriticalSection(&port->lock);
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if (n == 0) {
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event_iocp_port_unlock_and_free_(port);
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return 0;
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} else {
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return -1;
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}
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}
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int
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event_iocp_activate_overlapped_(
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struct event_iocp_port *port, struct event_overlapped *o,
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ev_uintptr_t key, ev_uint32_t n)
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{
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BOOL r;
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r = PostQueuedCompletionStatus(port->port, n, key, &o->overlapped);
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return (r==0) ? -1 : 0;
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}
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struct event_iocp_port *
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event_base_get_iocp_(struct event_base *base)
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{
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#ifdef _WIN32
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return base->iocp;
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#else
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return NULL;
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#endif
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}
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