From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- .../src/third_party/libevent/win32select.c | 389 +++++++++++++++++++++ 1 file changed, 389 insertions(+) create mode 100644 ipc/chromium/src/third_party/libevent/win32select.c (limited to 'ipc/chromium/src/third_party/libevent/win32select.c') diff --git a/ipc/chromium/src/third_party/libevent/win32select.c b/ipc/chromium/src/third_party/libevent/win32select.c new file mode 100644 index 0000000000..d005b587d4 --- /dev/null +++ b/ipc/chromium/src/third_party/libevent/win32select.c @@ -0,0 +1,389 @@ +/* + * Copyright 2007-2012 Niels Provos and Nick Mathewson + * Copyright 2000-2007 Niels Provos + * Copyright 2003 Michael A. Davis + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include "event2/event-config.h" +#include "evconfig-private.h" + +#ifdef _WIN32 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "event2/util.h" +#include "util-internal.h" +#include "log-internal.h" +#include "event2/event.h" +#include "event-internal.h" +#include "evmap-internal.h" +#include "event2/thread.h" +#include "evthread-internal.h" +#include "time-internal.h" + +#define XFREE(ptr) do { if (ptr) mm_free(ptr); } while (0) + +extern struct event_list timequeue; +extern struct event_list addqueue; + +struct win_fd_set { + unsigned int fd_count; + SOCKET fd_array[1]; +}; + +/* MSDN says this is required to handle SIGFPE */ +volatile double SIGFPE_REQ = 0.0f; + +struct idx_info { + int read_pos_plus1; + int write_pos_plus1; +}; + +struct win32op { + unsigned num_fds_in_fd_sets; + int resize_out_sets; + struct win_fd_set *readset_in; + struct win_fd_set *writeset_in; + struct win_fd_set *readset_out; + struct win_fd_set *writeset_out; + struct win_fd_set *exset_out; + unsigned signals_are_broken : 1; +}; + +static void *win32_init(struct event_base *); +static int win32_add(struct event_base *, evutil_socket_t, short old, short events, void *idx_); +static int win32_del(struct event_base *, evutil_socket_t, short old, short events, void *idx_); +static int win32_dispatch(struct event_base *base, struct timeval *); +static void win32_dealloc(struct event_base *); + +struct eventop win32ops = { + "win32", + win32_init, + win32_add, + win32_del, + win32_dispatch, + win32_dealloc, + 0, /* doesn't need reinit */ + 0, /* No features supported. */ + sizeof(struct idx_info), +}; + +#define FD_SET_ALLOC_SIZE(n) ((sizeof(struct win_fd_set) + ((n)-1)*sizeof(SOCKET))) + +static int +grow_fd_sets(struct win32op *op, unsigned new_num_fds) +{ + size_t size; + + EVUTIL_ASSERT(new_num_fds >= op->readset_in->fd_count && + new_num_fds >= op->writeset_in->fd_count); + EVUTIL_ASSERT(new_num_fds >= 1); + + size = FD_SET_ALLOC_SIZE(new_num_fds); + if (!(op->readset_in = mm_realloc(op->readset_in, size))) + return (-1); + if (!(op->writeset_in = mm_realloc(op->writeset_in, size))) + return (-1); + op->resize_out_sets = 1; + op->num_fds_in_fd_sets = new_num_fds; + return (0); +} + +static int +do_fd_set(struct win32op *op, struct idx_info *ent, evutil_socket_t s, int read) +{ + struct win_fd_set *set = read ? op->readset_in : op->writeset_in; + if (read) { + if (ent->read_pos_plus1 > 0) + return (0); + } else { + if (ent->write_pos_plus1 > 0) + return (0); + } + if (set->fd_count == op->num_fds_in_fd_sets) { + if (grow_fd_sets(op, op->num_fds_in_fd_sets*2)) + return (-1); + /* set pointer will have changed and needs reiniting! */ + set = read ? op->readset_in : op->writeset_in; + } + set->fd_array[set->fd_count] = s; + if (read) + ent->read_pos_plus1 = set->fd_count+1; + else + ent->write_pos_plus1 = set->fd_count+1; + return (set->fd_count++); +} + +static int +do_fd_clear(struct event_base *base, + struct win32op *op, struct idx_info *ent, int read) +{ + int i; + struct win_fd_set *set = read ? op->readset_in : op->writeset_in; + if (read) { + i = ent->read_pos_plus1 - 1; + ent->read_pos_plus1 = 0; + } else { + i = ent->write_pos_plus1 - 1; + ent->write_pos_plus1 = 0; + } + if (i < 0) + return (0); + if (--set->fd_count != (unsigned)i) { + struct idx_info *ent2; + SOCKET s2; + s2 = set->fd_array[i] = set->fd_array[set->fd_count]; + + ent2 = evmap_io_get_fdinfo_(&base->io, s2); + + if (!ent2) /* This indicates a bug. */ + return (0); + if (read) + ent2->read_pos_plus1 = i+1; + else + ent2->write_pos_plus1 = i+1; + } + return (0); +} + +#define NEVENT 32 +void * +win32_init(struct event_base *base) +{ + struct win32op *winop; + size_t size; + if (!(winop = mm_calloc(1, sizeof(struct win32op)))) + return NULL; + winop->num_fds_in_fd_sets = NEVENT; + size = FD_SET_ALLOC_SIZE(NEVENT); + if (!(winop->readset_in = mm_malloc(size))) + goto err; + if (!(winop->writeset_in = mm_malloc(size))) + goto err; + if (!(winop->readset_out = mm_malloc(size))) + goto err; + if (!(winop->writeset_out = mm_malloc(size))) + goto err; + if (!(winop->exset_out = mm_malloc(size))) + goto err; + winop->readset_in->fd_count = winop->writeset_in->fd_count = 0; + winop->readset_out->fd_count = winop->writeset_out->fd_count + = winop->exset_out->fd_count = 0; + + if (evsig_init_(base) < 0) + winop->signals_are_broken = 1; + + evutil_weakrand_seed_(&base->weakrand_seed, 0); + + return (winop); + err: + XFREE(winop->readset_in); + XFREE(winop->writeset_in); + XFREE(winop->readset_out); + XFREE(winop->writeset_out); + XFREE(winop->exset_out); + XFREE(winop); + return (NULL); +} + +int +win32_add(struct event_base *base, evutil_socket_t fd, + short old, short events, void *idx_) +{ + struct win32op *win32op = base->evbase; + struct idx_info *idx = idx_; + + if ((events & EV_SIGNAL) && win32op->signals_are_broken) + return (-1); + + if (!(events & (EV_READ|EV_WRITE))) + return (0); + + event_debug(("%s: adding event for %d", __func__, (int)fd)); + if (events & EV_READ) { + if (do_fd_set(win32op, idx, fd, 1)<0) + return (-1); + } + if (events & EV_WRITE) { + if (do_fd_set(win32op, idx, fd, 0)<0) + return (-1); + } + return (0); +} + +int +win32_del(struct event_base *base, evutil_socket_t fd, short old, short events, + void *idx_) +{ + struct win32op *win32op = base->evbase; + struct idx_info *idx = idx_; + + event_debug(("%s: Removing event for "EV_SOCK_FMT, + __func__, EV_SOCK_ARG(fd))); + if (events & EV_READ) + do_fd_clear(base, win32op, idx, 1); + if (events & EV_WRITE) + do_fd_clear(base, win32op, idx, 0); + + return 0; +} + +static void +fd_set_copy(struct win_fd_set *out, const struct win_fd_set *in) +{ + out->fd_count = in->fd_count; + memcpy(out->fd_array, in->fd_array, in->fd_count * (sizeof(SOCKET))); +} + +/* + static void dump_fd_set(struct win_fd_set *s) + { + unsigned int i; + printf("[ "); + for(i=0;ifd_count;++i) + printf("%d ",(int)s->fd_array[i]); + printf("]\n"); + } +*/ + +int +win32_dispatch(struct event_base *base, struct timeval *tv) +{ + struct win32op *win32op = base->evbase; + int res = 0; + unsigned j, i; + int fd_count; + SOCKET s; + + if (win32op->resize_out_sets) { + size_t size = FD_SET_ALLOC_SIZE(win32op->num_fds_in_fd_sets); + if (!(win32op->readset_out = mm_realloc(win32op->readset_out, size))) + return (-1); + if (!(win32op->exset_out = mm_realloc(win32op->exset_out, size))) + return (-1); + if (!(win32op->writeset_out = mm_realloc(win32op->writeset_out, size))) + return (-1); + win32op->resize_out_sets = 0; + } + + fd_set_copy(win32op->readset_out, win32op->readset_in); + fd_set_copy(win32op->exset_out, win32op->writeset_in); + fd_set_copy(win32op->writeset_out, win32op->writeset_in); + + fd_count = + (win32op->readset_out->fd_count > win32op->writeset_out->fd_count) ? + win32op->readset_out->fd_count : win32op->writeset_out->fd_count; + + if (!fd_count) { + long msec = tv ? evutil_tv_to_msec_(tv) : LONG_MAX; + /* Sleep's DWORD argument is unsigned long */ + if (msec < 0) + msec = LONG_MAX; + /* Windows doesn't like you to call select() with no sockets */ + Sleep(msec); + return (0); + } + + EVBASE_RELEASE_LOCK(base, th_base_lock); + + res = select(fd_count, + (struct fd_set*)win32op->readset_out, + (struct fd_set*)win32op->writeset_out, + (struct fd_set*)win32op->exset_out, tv); + + EVBASE_ACQUIRE_LOCK(base, th_base_lock); + + event_debug(("%s: select returned %d", __func__, res)); + + if (res <= 0) { + event_debug(("%s: %s", __func__, + evutil_socket_error_to_string(EVUTIL_SOCKET_ERROR()))); + return res; + } + + if (win32op->readset_out->fd_count) { + i = evutil_weakrand_range_(&base->weakrand_seed, + win32op->readset_out->fd_count); + for (j=0; jreadset_out->fd_count; ++j) { + if (++i >= win32op->readset_out->fd_count) + i = 0; + s = win32op->readset_out->fd_array[i]; + evmap_io_active_(base, s, EV_READ); + } + } + if (win32op->exset_out->fd_count) { + i = evutil_weakrand_range_(&base->weakrand_seed, + win32op->exset_out->fd_count); + for (j=0; jexset_out->fd_count; ++j) { + if (++i >= win32op->exset_out->fd_count) + i = 0; + s = win32op->exset_out->fd_array[i]; + evmap_io_active_(base, s, EV_WRITE); + } + } + if (win32op->writeset_out->fd_count) { + i = evutil_weakrand_range_(&base->weakrand_seed, + win32op->writeset_out->fd_count); + for (j=0; jwriteset_out->fd_count; ++j) { + if (++i >= win32op->writeset_out->fd_count) + i = 0; + s = win32op->writeset_out->fd_array[i]; + evmap_io_active_(base, s, EV_WRITE); + } + } + return (0); +} + +void +win32_dealloc(struct event_base *base) +{ + struct win32op *win32op = base->evbase; + + evsig_dealloc_(base); + if (win32op->readset_in) + mm_free(win32op->readset_in); + if (win32op->writeset_in) + mm_free(win32op->writeset_in); + if (win32op->readset_out) + mm_free(win32op->readset_out); + if (win32op->writeset_out) + mm_free(win32op->writeset_out); + if (win32op->exset_out) + mm_free(win32op->exset_out); + /* XXXXX free the tree. */ + + memset(win32op, 0, sizeof(*win32op)); + mm_free(win32op); +} + +#endif -- cgit v1.2.3