Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2009-2012 Niels Provos, Nick Mathewson |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * 3. The name of the author may not be used to endorse or promote products |
| 13 | * derived from this software without specific prior written permission. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 26 | #include "evconfig-private.h" |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 27 | |
| 28 | #ifndef _WIN32_WINNT |
| 29 | /* Minimum required for InitializeCriticalSectionAndSpinCount */ |
| 30 | #define _WIN32_WINNT 0x0403 |
| 31 | #endif |
| 32 | #include <winsock2.h> |
| 33 | #include <windows.h> |
| 34 | #include <process.h> |
| 35 | #include <stdio.h> |
| 36 | #include <mswsock.h> |
| 37 | |
| 38 | #include "event2/util.h" |
| 39 | #include "util-internal.h" |
| 40 | #include "iocp-internal.h" |
| 41 | #include "log-internal.h" |
| 42 | #include "mm-internal.h" |
| 43 | #include "event-internal.h" |
| 44 | #include "evthread-internal.h" |
| 45 | |
| 46 | #define NOTIFICATION_KEY ((ULONG_PTR)-1) |
| 47 | |
| 48 | void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 49 | event_overlapped_init_(struct event_overlapped *o, iocp_callback cb) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 50 | { |
| 51 | memset(o, 0, sizeof(struct event_overlapped)); |
| 52 | o->cb = cb; |
| 53 | } |
| 54 | |
| 55 | static void |
| 56 | handle_entry(OVERLAPPED *o, ULONG_PTR completion_key, DWORD nBytes, int ok) |
| 57 | { |
| 58 | struct event_overlapped *eo = |
| 59 | EVUTIL_UPCAST(o, struct event_overlapped, overlapped); |
| 60 | eo->cb(eo, completion_key, nBytes, ok); |
| 61 | } |
| 62 | |
| 63 | static void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 64 | loop(void *port_) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 65 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 66 | struct event_iocp_port *port = port_; |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 67 | long ms = port->ms; |
| 68 | HANDLE p = port->port; |
| 69 | |
| 70 | if (ms <= 0) |
| 71 | ms = INFINITE; |
| 72 | |
| 73 | while (1) { |
| 74 | OVERLAPPED *overlapped=NULL; |
| 75 | ULONG_PTR key=0; |
| 76 | DWORD bytes=0; |
| 77 | int ok = GetQueuedCompletionStatus(p, &bytes, &key, |
| 78 | &overlapped, ms); |
| 79 | EnterCriticalSection(&port->lock); |
| 80 | if (port->shutdown) { |
| 81 | if (--port->n_live_threads == 0) |
| 82 | ReleaseSemaphore(port->shutdownSemaphore, 1, |
| 83 | NULL); |
| 84 | LeaveCriticalSection(&port->lock); |
| 85 | return; |
| 86 | } |
| 87 | LeaveCriticalSection(&port->lock); |
| 88 | |
| 89 | if (key != NOTIFICATION_KEY && overlapped) |
| 90 | handle_entry(overlapped, key, bytes, ok); |
| 91 | else if (!overlapped) |
| 92 | break; |
| 93 | } |
| 94 | event_warnx("GetQueuedCompletionStatus exited with no event."); |
| 95 | EnterCriticalSection(&port->lock); |
| 96 | if (--port->n_live_threads == 0) |
| 97 | ReleaseSemaphore(port->shutdownSemaphore, 1, NULL); |
| 98 | LeaveCriticalSection(&port->lock); |
| 99 | } |
| 100 | |
| 101 | int |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 102 | event_iocp_port_associate_(struct event_iocp_port *port, evutil_socket_t fd, |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 103 | ev_uintptr_t key) |
| 104 | { |
| 105 | HANDLE h; |
| 106 | h = CreateIoCompletionPort((HANDLE)fd, port->port, key, port->n_threads); |
| 107 | if (!h) |
| 108 | return -1; |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static void * |
| 113 | get_extension_function(SOCKET s, const GUID *which_fn) |
| 114 | { |
| 115 | void *ptr = NULL; |
| 116 | DWORD bytes=0; |
| 117 | WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, |
| 118 | (GUID*)which_fn, sizeof(*which_fn), |
| 119 | &ptr, sizeof(ptr), |
| 120 | &bytes, NULL, NULL); |
| 121 | |
| 122 | /* No need to detect errors here: if ptr is set, then we have a good |
| 123 | function pointer. Otherwise, we should behave as if we had no |
| 124 | function pointer. |
| 125 | */ |
| 126 | return ptr; |
| 127 | } |
| 128 | |
| 129 | /* Mingw doesn't have these in its mswsock.h. The values are copied from |
| 130 | wine.h. Perhaps if we copy them exactly, the cargo will come again. |
| 131 | */ |
| 132 | #ifndef WSAID_ACCEPTEX |
| 133 | #define WSAID_ACCEPTEX \ |
| 134 | {0xb5367df1,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}} |
| 135 | #endif |
| 136 | #ifndef WSAID_CONNECTEX |
| 137 | #define WSAID_CONNECTEX \ |
| 138 | {0x25a207b9,0xddf3,0x4660,{0x8e,0xe9,0x76,0xe5,0x8c,0x74,0x06,0x3e}} |
| 139 | #endif |
| 140 | #ifndef WSAID_GETACCEPTEXSOCKADDRS |
| 141 | #define WSAID_GETACCEPTEXSOCKADDRS \ |
| 142 | {0xb5367df2,0xcbac,0x11cf,{0x95,0xca,0x00,0x80,0x5f,0x48,0xa1,0x92}} |
| 143 | #endif |
| 144 | |
| 145 | static int extension_fns_initialized = 0; |
| 146 | |
| 147 | static void |
| 148 | init_extension_functions(struct win32_extension_fns *ext) |
| 149 | { |
| 150 | const GUID acceptex = WSAID_ACCEPTEX; |
| 151 | const GUID connectex = WSAID_CONNECTEX; |
| 152 | const GUID getacceptexsockaddrs = WSAID_GETACCEPTEXSOCKADDRS; |
| 153 | SOCKET s = socket(AF_INET, SOCK_STREAM, 0); |
| 154 | if (s == INVALID_SOCKET) |
| 155 | return; |
| 156 | ext->AcceptEx = get_extension_function(s, &acceptex); |
| 157 | ext->ConnectEx = get_extension_function(s, &connectex); |
| 158 | ext->GetAcceptExSockaddrs = get_extension_function(s, |
| 159 | &getacceptexsockaddrs); |
| 160 | closesocket(s); |
| 161 | |
| 162 | extension_fns_initialized = 1; |
| 163 | } |
| 164 | |
| 165 | static struct win32_extension_fns the_extension_fns; |
| 166 | |
| 167 | const struct win32_extension_fns * |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 168 | event_get_win32_extension_fns_(void) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 169 | { |
| 170 | return &the_extension_fns; |
| 171 | } |
| 172 | |
| 173 | #define N_CPUS_DEFAULT 2 |
| 174 | |
| 175 | struct event_iocp_port * |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 176 | event_iocp_port_launch_(int n_cpus) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 177 | { |
| 178 | struct event_iocp_port *port; |
| 179 | int i; |
| 180 | |
| 181 | if (!extension_fns_initialized) |
| 182 | init_extension_functions(&the_extension_fns); |
| 183 | |
| 184 | if (!(port = mm_calloc(1, sizeof(struct event_iocp_port)))) |
| 185 | return NULL; |
| 186 | |
| 187 | if (n_cpus <= 0) |
| 188 | n_cpus = N_CPUS_DEFAULT; |
| 189 | port->n_threads = n_cpus * 2; |
| 190 | port->threads = mm_calloc(port->n_threads, sizeof(HANDLE)); |
| 191 | if (!port->threads) |
| 192 | goto err; |
| 193 | |
| 194 | port->port = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, |
| 195 | n_cpus); |
| 196 | port->ms = -1; |
| 197 | if (!port->port) |
| 198 | goto err; |
| 199 | |
| 200 | port->shutdownSemaphore = CreateSemaphore(NULL, 0, 1, NULL); |
| 201 | if (!port->shutdownSemaphore) |
| 202 | goto err; |
| 203 | |
| 204 | for (i=0; i<port->n_threads; ++i) { |
| 205 | ev_uintptr_t th = _beginthread(loop, 0, port); |
| 206 | if (th == (ev_uintptr_t)-1) |
| 207 | goto err; |
| 208 | port->threads[i] = (HANDLE)th; |
| 209 | ++port->n_live_threads; |
| 210 | } |
| 211 | |
| 212 | InitializeCriticalSectionAndSpinCount(&port->lock, 1000); |
| 213 | |
| 214 | return port; |
| 215 | err: |
| 216 | if (port->port) |
| 217 | CloseHandle(port->port); |
| 218 | if (port->threads) |
| 219 | mm_free(port->threads); |
| 220 | if (port->shutdownSemaphore) |
| 221 | CloseHandle(port->shutdownSemaphore); |
| 222 | mm_free(port); |
| 223 | return NULL; |
| 224 | } |
| 225 | |
| 226 | static void |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 227 | event_iocp_port_unlock_and_free_(struct event_iocp_port *port) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 228 | { |
| 229 | DeleteCriticalSection(&port->lock); |
| 230 | CloseHandle(port->port); |
| 231 | CloseHandle(port->shutdownSemaphore); |
| 232 | mm_free(port->threads); |
| 233 | mm_free(port); |
| 234 | } |
| 235 | |
| 236 | static int |
| 237 | event_iocp_notify_all(struct event_iocp_port *port) |
| 238 | { |
| 239 | int i, r, ok=1; |
| 240 | for (i=0; i<port->n_threads; ++i) { |
| 241 | r = PostQueuedCompletionStatus(port->port, 0, NOTIFICATION_KEY, |
| 242 | NULL); |
| 243 | if (!r) |
| 244 | ok = 0; |
| 245 | } |
| 246 | return ok ? 0 : -1; |
| 247 | } |
| 248 | |
| 249 | int |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 250 | event_iocp_shutdown_(struct event_iocp_port *port, long waitMsec) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 251 | { |
| 252 | DWORD ms = INFINITE; |
| 253 | int n; |
| 254 | |
| 255 | EnterCriticalSection(&port->lock); |
| 256 | port->shutdown = 1; |
| 257 | LeaveCriticalSection(&port->lock); |
| 258 | event_iocp_notify_all(port); |
| 259 | |
| 260 | if (waitMsec >= 0) |
| 261 | ms = waitMsec; |
| 262 | |
| 263 | WaitForSingleObject(port->shutdownSemaphore, ms); |
| 264 | EnterCriticalSection(&port->lock); |
| 265 | n = port->n_live_threads; |
| 266 | LeaveCriticalSection(&port->lock); |
| 267 | if (n == 0) { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 268 | event_iocp_port_unlock_and_free_(port); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 269 | return 0; |
| 270 | } else { |
| 271 | return -1; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | int |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 276 | event_iocp_activate_overlapped_( |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 277 | struct event_iocp_port *port, struct event_overlapped *o, |
| 278 | ev_uintptr_t key, ev_uint32_t n) |
| 279 | { |
| 280 | BOOL r; |
| 281 | |
| 282 | r = PostQueuedCompletionStatus(port->port, n, key, &o->overlapped); |
| 283 | return (r==0) ? -1 : 0; |
| 284 | } |
| 285 | |
| 286 | struct event_iocp_port * |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 287 | event_base_get_iocp_(struct event_base *base) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 288 | { |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 289 | #ifdef _WIN32 |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 290 | return base->iocp; |
| 291 | #else |
| 292 | return NULL; |
| 293 | #endif |
| 294 | } |