/
threadpool.c
1260 lines (1075 loc) · 31.4 KB
/
threadpool.c
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/*
* threadpool.c: global thread pool
*
* Authors:
* Dietmar Maurer (dietmar@ximian.com)
* Gonzalo Paniagua Javier (gonzalo@ximian.com)
*
* (C) 2001-2003 Ximian, Inc.
* (c) 2004,2005 Novell, Inc. (http://www.novell.com)
*/
#include <config.h>
#include <glib.h>
#ifdef PLATFORM_WIN32
#define WINVER 0x0500
#define _WIN32_WINNT 0x0500
#endif
#define THREADS_PER_CPU 5 /* 20 + THREADS_PER_CPU * number of CPUs */
#include <mono/metadata/domain-internals.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/threads.h>
#include <mono/metadata/threads-types.h>
#include <mono/metadata/threadpool-internals.h>
#include <mono/metadata/exception.h>
#include <mono/metadata/file-io.h>
#include <mono/metadata/monitor.h>
#include <mono/metadata/marshal.h>
#include <mono/metadata/socket-io.h>
#include <mono/io-layer/io-layer.h>
#include <mono/os/gc_wrapper.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <mono/utils/mono-poll.h>
#ifdef HAVE_EPOLL
#include <sys/epoll.h>
#endif
#include "mono/io-layer/socket-wrappers.h"
#include "threadpool.h"
#define THREAD_WANTS_A_BREAK(t) ((t->state & (ThreadState_StopRequested | \
ThreadState_SuspendRequested)) != 0)
#undef EPOLL_DEBUG
/* maximum number of worker threads */
static int mono_max_worker_threads;
static int mono_min_worker_threads;
static int mono_io_max_worker_threads;
/* current number of worker threads */
static int mono_worker_threads = 0;
static int io_worker_threads = 0;
/* current number of busy threads */
static int busy_worker_threads = 0;
static int busy_io_worker_threads;
/* mono_thread_pool_init called */
static int tp_inited;
/* we use this to store a reference to the AsyncResult to avoid GC */
static MonoGHashTable *ares_htable = NULL;
static CRITICAL_SECTION ares_lock;
static CRITICAL_SECTION io_queue_lock;
static int pending_io_items;
typedef struct {
CRITICAL_SECTION io_lock; /* access to sock_to_state */
int inited;
int pipe [2];
GHashTable *sock_to_state;
HANDLE new_sem; /* access to newpfd and write side of the pipe */
mono_pollfd *newpfd;
gboolean epoll_disabled;
#ifdef HAVE_EPOLL
int epollfd;
#endif
} SocketIOData;
static SocketIOData socket_io_data;
/* we append a job */
static HANDLE job_added;
static HANDLE io_job_added;
typedef struct {
MonoMethodMessage *msg;
HANDLE wait_event;
MonoMethod *cb_method;
MonoDelegate *cb_target;
MonoObject *state;
MonoObject *res;
MonoArray *out_args;
} ASyncCall;
static void async_invoke_thread (gpointer data);
static void append_job (CRITICAL_SECTION *cs, GList **plist, gpointer ar);
static void start_thread_or_queue (MonoAsyncResult *ares);
static void mono_async_invoke (MonoAsyncResult *ares);
static gpointer dequeue_job (CRITICAL_SECTION *cs, GList **plist);
static GList *async_call_queue = NULL;
static GList *async_io_queue = NULL;
static MonoClass *socket_async_call_klass;
#define INIT_POLLFD(a, b, c) {(a)->fd = b; (a)->events = c; (a)->revents = 0;}
enum {
AIO_OP_FIRST,
AIO_OP_ACCEPT = 0,
AIO_OP_CONNECT,
AIO_OP_RECEIVE,
AIO_OP_RECEIVEFROM,
AIO_OP_SEND,
AIO_OP_SENDTO,
AIO_OP_RECV_JUST_CALLBACK,
AIO_OP_SEND_JUST_CALLBACK,
AIO_OP_LAST
};
static void
socket_io_cleanup (SocketIOData *data)
{
gint release;
if (data->inited == 0)
return;
EnterCriticalSection (&data->io_lock);
data->inited = 0;
#ifdef PLATFORM_WIN32
closesocket (data->pipe [0]);
closesocket (data->pipe [1]);
#else
close (data->pipe [0]);
close (data->pipe [1]);
#endif
data->pipe [0] = -1;
data->pipe [1] = -1;
if (data->new_sem)
CloseHandle (data->new_sem);
data->new_sem = NULL;
g_hash_table_destroy (data->sock_to_state);
data->sock_to_state = NULL;
g_list_free (async_io_queue);
async_io_queue = NULL;
release = (gint) InterlockedCompareExchange (&io_worker_threads, 0, -1);
if (io_job_added)
ReleaseSemaphore (io_job_added, release, NULL);
g_free (data->newpfd);
data->newpfd = NULL;
#ifdef HAVE_EPOLL
if (FALSE == data->epoll_disabled)
close (data->epollfd);
#endif
LeaveCriticalSection (&data->io_lock);
}
static int
get_event_from_state (MonoSocketAsyncResult *state)
{
switch (state->operation) {
case AIO_OP_ACCEPT:
case AIO_OP_RECEIVE:
case AIO_OP_RECV_JUST_CALLBACK:
case AIO_OP_RECEIVEFROM:
return MONO_POLLIN;
case AIO_OP_SEND:
case AIO_OP_SEND_JUST_CALLBACK:
case AIO_OP_SENDTO:
case AIO_OP_CONNECT:
return MONO_POLLOUT;
default: /* Should never happen */
g_print ("get_event_from_state: unknown value in switch!!!\n");
return 0;
}
}
static int
get_events_from_list (GSList *list)
{
MonoSocketAsyncResult *state;
int events = 0;
while (list && list->data) {
state = (MonoSocketAsyncResult *) list->data;
events |= get_event_from_state (state);
list = list->next;
}
return events;
}
#define ICALL_RECV(x) ves_icall_System_Net_Sockets_Socket_Receive_internal (\
(SOCKET) x->handle, x->buffer, x->offset, x->size,\
x->socket_flags, &x->error);
#define ICALL_SEND(x) ves_icall_System_Net_Sockets_Socket_Send_internal (\
(SOCKET) x->handle, x->buffer, x->offset, x->size,\
x->socket_flags, &x->error);
static void
async_invoke_io_thread (gpointer data)
{
MonoDomain *domain;
MonoThread *thread;
thread = mono_thread_current ();
thread->threadpool_thread = TRUE;
ves_icall_System_Threading_Thread_SetState (thread, ThreadState_Background);
for (;;) {
MonoSocketAsyncResult *state;
MonoAsyncResult *ar;
state = (MonoSocketAsyncResult *) data;
if (state) {
InterlockedDecrement (&pending_io_items);
ar = state->ares;
/* worker threads invokes methods in different domains,
* so we need to set the right domain here */
switch (state->operation) {
case AIO_OP_RECEIVE:
state->total = ICALL_RECV (state);
break;
case AIO_OP_SEND:
state->total = ICALL_SEND (state);
break;
}
domain = ((MonoObject *)ar)->vtable->domain;
mono_thread_push_appdomain_ref (domain);
if (mono_domain_set (domain, FALSE)) {
ASyncCall *ac;
mono_async_invoke (ar);
ac = (ASyncCall *) ar->data;
/*
if (ac->msg->exc != NULL)
mono_unhandled_exception (ac->msg->exc);
*/
mono_domain_set (mono_get_root_domain (), TRUE);
}
mono_thread_pop_appdomain_ref ();
InterlockedDecrement (&busy_io_worker_threads);
}
data = dequeue_job (&io_queue_lock, &async_io_queue);
if (!data) {
guint32 wr;
int timeout = 10000;
guint32 start_time = GetTickCount ();
do {
wr = WaitForSingleObjectEx (io_job_added, (guint32)timeout, TRUE);
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
timeout -= GetTickCount () - start_time;
if (wr != WAIT_TIMEOUT)
data = dequeue_job (&io_queue_lock, &async_io_queue);
}
while (!data && timeout > 0);
}
if (!data) {
if (InterlockedDecrement (&io_worker_threads) < 2) {
/* If we have pending items, keep the thread alive */
if (InterlockedCompareExchange (&pending_io_items, 0, 0) != 0) {
InterlockedIncrement (&io_worker_threads);
continue;
}
}
return;
}
InterlockedIncrement (&busy_io_worker_threads);
}
g_assert_not_reached ();
}
static void
start_io_thread_or_queue (MonoSocketAsyncResult *ares)
{
int busy, worker;
MonoDomain *domain;
busy = (int) InterlockedCompareExchange (&busy_io_worker_threads, 0, -1);
worker = (int) InterlockedCompareExchange (&io_worker_threads, 0, -1);
if (worker <= ++busy &&
worker < mono_io_max_worker_threads) {
InterlockedIncrement (&busy_io_worker_threads);
InterlockedIncrement (&io_worker_threads);
domain = ((ares) ? ((MonoObject *) ares)->vtable->domain : mono_domain_get ());
mono_thread_create (mono_get_root_domain (), async_invoke_io_thread, ares);
} else {
append_job (&io_queue_lock, &async_io_queue, ares);
ReleaseSemaphore (io_job_added, 1, NULL);
}
}
static GSList *
process_io_event (GSList *list, int event)
{
MonoSocketAsyncResult *state;
GSList *oldlist;
oldlist = list;
state = NULL;
while (list) {
state = (MonoSocketAsyncResult *) list->data;
if (get_event_from_state (state) == event)
break;
list = list->next;
}
if (list != NULL) {
oldlist = g_slist_remove_link (oldlist, list);
g_slist_free_1 (list);
#ifdef EPOLL_DEBUG
g_print ("Dispatching event %d on socket %d\n", event, state->handle);
#endif
InterlockedIncrement (&pending_io_items);
start_io_thread_or_queue (state);
}
return oldlist;
}
static int
mark_bad_fds (mono_pollfd *pfds, int nfds)
{
int i, ret;
mono_pollfd *pfd;
int count = 0;
for (i = 0; i < nfds; i++) {
pfd = &pfds [i];
if (pfd->fd == -1)
continue;
ret = mono_poll (pfd, 1, 0);
if (ret == -1 && errno == EBADF) {
pfd->revents |= MONO_POLLNVAL;
count++;
} else if (ret == 1) {
count++;
}
}
return count;
}
static void
socket_io_poll_main (gpointer p)
{
#define INITIAL_POLLFD_SIZE 1024
#define POLL_ERRORS (MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL)
SocketIOData *data = p;
mono_pollfd *pfds;
gint maxfd = 1;
gint allocated;
gint i;
MonoThread *thread;
thread = mono_thread_current ();
thread->threadpool_thread = TRUE;
ves_icall_System_Threading_Thread_SetState (thread, ThreadState_Background);
allocated = INITIAL_POLLFD_SIZE;
pfds = g_new0 (mono_pollfd, allocated);
INIT_POLLFD (pfds, data->pipe [0], MONO_POLLIN);
for (i = 1; i < allocated; i++)
INIT_POLLFD (&pfds [i], -1, 0);
while (1) {
int nsock = 0;
mono_pollfd *pfd;
char one [1];
GSList *list;
do {
if (nsock == -1) {
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
}
nsock = mono_poll (pfds, maxfd, -1);
} while (nsock == -1 && errno == EINTR);
/*
* Apart from EINTR, we only check EBADF, for the rest:
* EINVAL: mono_poll() 'protects' us from descriptor
* numbers above the limit if using select() by marking
* then as MONO_POLLERR. If a system poll() is being
* used, the number of descriptor we're passing will not
* be over sysconf(_SC_OPEN_MAX), as the error would have
* happened when opening.
*
* EFAULT: we own the memory pointed by pfds.
* ENOMEM: we're doomed anyway
*
*/
if (nsock == -1 && errno == EBADF) {
pfds->revents = 0; /* Just in case... */
nsock = mark_bad_fds (pfds, maxfd);
}
if ((pfds->revents & POLL_ERRORS) != 0) {
/* We're supposed to die now, as the pipe has been closed */
g_free (pfds);
socket_io_cleanup (data);
return;
}
/* Got a new socket */
if ((pfds->revents & MONO_POLLIN) != 0) {
int nread;
for (i = 1; i < allocated; i++) {
pfd = &pfds [i];
if (pfd->fd == -1 || pfd->fd == data->newpfd->fd)
break;
}
if (i == allocated) {
mono_pollfd *oldfd;
oldfd = pfds;
i = allocated;
allocated = allocated * 2;
pfds = g_renew (mono_pollfd, oldfd, allocated);
g_free (oldfd);
for (; i < allocated; i++)
INIT_POLLFD (&pfds [i], -1, 0);
}
#ifndef PLATFORM_WIN32
nread = read (data->pipe [0], one, 1);
#else
nread = recv ((SOCKET) data->pipe [0], one, 1, 0);
#endif
if (nread <= 0) {
g_free (pfds);
return; /* we're closed */
}
INIT_POLLFD (&pfds [i], data->newpfd->fd, data->newpfd->events);
ReleaseSemaphore (data->new_sem, 1, NULL);
if (i >= maxfd)
maxfd = i + 1;
nsock--;
}
if (nsock == 0)
continue;
EnterCriticalSection (&data->io_lock);
if (data->inited == 0) {
g_free (pfds);
return; /* cleanup called */
}
for (i = 1; i < maxfd && nsock > 0; i++) {
pfd = &pfds [i];
if (pfd->fd == -1 || pfd->revents == 0)
continue;
nsock--;
list = g_hash_table_lookup (data->sock_to_state, GINT_TO_POINTER (pfd->fd));
if (list != NULL && (pfd->revents & (MONO_POLLIN | POLL_ERRORS)) != 0) {
list = process_io_event (list, MONO_POLLIN);
}
if (list != NULL && (pfd->revents & (MONO_POLLOUT | POLL_ERRORS)) != 0) {
list = process_io_event (list, MONO_POLLOUT);
}
if (list != NULL) {
g_hash_table_replace (data->sock_to_state, GINT_TO_POINTER (pfd->fd), list);
pfd->events = get_events_from_list (list);
} else {
g_hash_table_remove (data->sock_to_state, GINT_TO_POINTER (pfd->fd));
pfd->fd = -1;
if (i == maxfd - 1)
maxfd--;
}
}
LeaveCriticalSection (&data->io_lock);
}
}
#ifdef HAVE_EPOLL
#define EPOLL_ERRORS (EPOLLERR | EPOLLHUP)
static void
socket_io_epoll_main (gpointer p)
{
SocketIOData *data;
int epollfd;
MonoThread *thread;
struct epoll_event *events, *evt;
const int nevents = 512;
int ready = 0, i;
data = p;
epollfd = data->epollfd;
thread = mono_thread_current ();
thread->threadpool_thread = TRUE;
ves_icall_System_Threading_Thread_SetState (thread, ThreadState_Background);
events = g_new0 (struct epoll_event, nevents);
while (1) {
do {
if (ready == -1) {
if (THREAD_WANTS_A_BREAK (thread))
mono_thread_interruption_checkpoint ();
}
#ifdef EPOLL_DEBUG
g_print ("epoll_wait init\n");
#endif
ready = epoll_wait (epollfd, events, nevents, -1);
#ifdef EPOLL_DEBUG
{
int err = errno;
g_print ("epoll_wait end with %d ready sockets (%d %s).\n", ready, err, (err) ? g_strerror (err) : "");
errno = err;
}
#endif
} while (ready == -1 && errno == EINTR);
if (ready == -1) {
int err = errno;
g_free (events);
if (err != EBADF)
g_warning ("epoll_wait: %d %s\n", err, g_strerror (err));
close (epollfd);
return;
}
EnterCriticalSection (&data->io_lock);
if (data->inited == 0) {
#ifdef EPOLL_DEBUG
g_print ("data->inited == 0\n");
#endif
g_free (events);
close (epollfd);
return; /* cleanup called */
}
for (i = 0; i < ready; i++) {
int fd;
GSList *list;
evt = &events [i];
fd = evt->data.fd;
list = g_hash_table_lookup (data->sock_to_state, GINT_TO_POINTER (fd));
#ifdef EPOLL_DEBUG
g_print ("Event %d on %d list length: %d\n", evt->events, fd, g_slist_length (list));
#endif
if (list != NULL && (evt->events & (EPOLLIN | EPOLL_ERRORS)) != 0) {
list = process_io_event (list, MONO_POLLIN);
}
if (list != NULL && (evt->events & (EPOLLOUT | EPOLL_ERRORS)) != 0) {
list = process_io_event (list, MONO_POLLOUT);
}
if (list != NULL) {
g_hash_table_replace (data->sock_to_state, GINT_TO_POINTER (fd), list);
evt->events = get_events_from_list (list);
#ifdef EPOLL_DEBUG
g_print ("MOD %d to %d\n", fd, evt->events);
#endif
if (epoll_ctl (epollfd, EPOLL_CTL_MOD, fd, evt)) {
if (epoll_ctl (epollfd, EPOLL_CTL_ADD, fd, evt) == -1) {
#ifdef EPOLL_DEBUG
int err = errno;
g_message ("epoll_ctl(MOD): %d %s fd: %d events: %d", err, g_strerror (err), fd, evt->events);
errno = err;
#endif
}
}
} else {
g_hash_table_remove (data->sock_to_state, GINT_TO_POINTER (fd));
#ifdef EPOLL_DEBUG
g_print ("DEL %d\n", fd);
#endif
epoll_ctl (epollfd, EPOLL_CTL_DEL, fd, evt);
}
}
LeaveCriticalSection (&data->io_lock);
}
}
#endif
/*
* select/poll wake up when a socket is closed, but epoll just removes
* the socket from its internal list without notification.
*/
void
mono_thread_pool_remove_socket (int sock)
{
#ifdef HAVE_EPOLL
GSList *list, *next;
MonoSocketAsyncResult *state;
if (socket_io_data.epoll_disabled == TRUE || socket_io_data.inited == FALSE)
return;
EnterCriticalSection (&socket_io_data.io_lock);
list = g_hash_table_lookup (socket_io_data.sock_to_state, GINT_TO_POINTER (sock));
if (list) {
g_hash_table_remove (socket_io_data.sock_to_state, GINT_TO_POINTER (sock));
}
LeaveCriticalSection (&socket_io_data.io_lock);
while (list) {
state = (MonoSocketAsyncResult *) list->data;
if (state->operation == AIO_OP_RECEIVE)
state->operation = AIO_OP_RECV_JUST_CALLBACK;
else if (state->operation == AIO_OP_SEND)
state->operation = AIO_OP_SEND_JUST_CALLBACK;
next = g_slist_remove_link (list, list);
list = process_io_event (list, MONO_POLLIN);
if (list)
process_io_event (list, MONO_POLLOUT);
list = next;
}
#endif
}
#ifdef PLATFORM_WIN32
static void
connect_hack (gpointer x)
{
struct sockaddr_in *addr = (struct sockaddr_in *) x;
int count = 0;
while (connect ((SOCKET) socket_io_data.pipe [1], (SOCKADDR *) addr, sizeof (struct sockaddr_in))) {
Sleep (500);
if (++count > 3) {
g_warning ("Error initializing async. sockets %d.\n", WSAGetLastError ());
g_assert (WSAGetLastError ());
}
}
}
#endif
static void
socket_io_init (SocketIOData *data)
{
#ifdef PLATFORM_WIN32
struct sockaddr_in server;
struct sockaddr_in client;
SOCKET srv;
int len;
#endif
int inited;
inited = InterlockedCompareExchange (&data->inited, -1, -1);
if (inited == 1)
return;
EnterCriticalSection (&data->io_lock);
inited = InterlockedCompareExchange (&data->inited, -1, -1);
if (inited == 1) {
LeaveCriticalSection (&data->io_lock);
return;
}
#ifdef HAVE_EPOLL
data->epoll_disabled = (g_getenv ("MONO_DISABLE_AIO") != NULL);
if (FALSE == data->epoll_disabled) {
data->epollfd = epoll_create (256);
data->epoll_disabled = (data->epollfd == -1);
if (data->epoll_disabled && g_getenv ("MONO_DEBUG"))
g_message ("epoll_create() failed. Using plain poll().");
} else {
data->epollfd = -1;
}
#else
data->epoll_disabled = TRUE;
#endif
#ifndef PLATFORM_WIN32
if (data->epoll_disabled) {
if (pipe (data->pipe) != 0) {
int err = errno;
perror ("mono");
g_assert (err);
}
} else {
data->pipe [0] = -1;
data->pipe [1] = -1;
}
#else
srv = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
g_assert (srv != INVALID_SOCKET);
data->pipe [1] = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
g_assert (data->pipe [1] != INVALID_SOCKET);
server.sin_family = AF_INET;
server.sin_addr.s_addr = inet_addr ("127.0.0.1");
server.sin_port = 0;
if (bind (srv, (SOCKADDR *) &server, sizeof (server))) {
g_print ("%d\n", WSAGetLastError ());
g_assert (1 != 0);
}
len = sizeof (server);
getsockname (srv, (SOCKADDR *) &server, &len);
listen (srv, 1);
mono_thread_create (mono_get_root_domain (), connect_hack, &server);
len = sizeof (server);
data->pipe [0] = accept (srv, (SOCKADDR *) &client, &len);
g_assert (data->pipe [0] != INVALID_SOCKET);
closesocket (srv);
#endif
mono_io_max_worker_threads = mono_max_worker_threads / 2;
if (mono_io_max_worker_threads < 10)
mono_io_max_worker_threads = 10;
data->sock_to_state = g_hash_table_new (g_direct_hash, g_direct_equal);
if (data->epoll_disabled)
data->new_sem = CreateSemaphore (NULL, 1, 1, NULL);
io_job_added = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
InitializeCriticalSection (&io_queue_lock);
if (data->epoll_disabled) {
mono_thread_create (mono_get_root_domain (), socket_io_poll_main, data);
}
#ifdef HAVE_EPOLL
else {
mono_thread_create (mono_get_root_domain (), socket_io_epoll_main, data);
}
#endif
InterlockedCompareExchange (&data->inited, 1, 0);
LeaveCriticalSection (&data->io_lock);
}
static void
socket_io_add_poll (MonoSocketAsyncResult *state)
{
int events;
char msg [1];
GSList *list;
SocketIOData *data = &socket_io_data;
WaitForSingleObject (data->new_sem, INFINITE);
if (data->newpfd == NULL)
data->newpfd = g_new0 (mono_pollfd, 1);
EnterCriticalSection (&data->io_lock);
list = g_hash_table_lookup (data->sock_to_state, GINT_TO_POINTER (state->handle));
if (list == NULL) {
list = g_slist_alloc ();
list->data = state;
} else {
list = g_slist_append (list, state);
}
events = get_events_from_list (list);
#ifdef PLATFORM_MACOSX
/* select() for connect() does not work well on the Mac. Bug #75436. */
if (state->operation == AIO_OP_CONNECT && state->blocking == TRUE) {
start_io_thread_or_queue (state);
return;
}
#endif
INIT_POLLFD (data->newpfd, GPOINTER_TO_INT (state->handle), events);
g_hash_table_replace (data->sock_to_state, GINT_TO_POINTER (state->handle), list);
LeaveCriticalSection (&data->io_lock);
*msg = (char) state->operation;
#ifndef PLATFORM_WIN32
write (data->pipe [1], msg, 1);
#else
send ((SOCKET) data->pipe [1], msg, 1, 0);
#endif
}
#ifdef HAVE_EPOLL
static gboolean
socket_io_add_epoll (MonoSocketAsyncResult *state)
{
GSList *list;
SocketIOData *data = &socket_io_data;
struct epoll_event event;
int epoll_op, ievt;
int fd;
memset (&event, 0, sizeof (struct epoll_event));
fd = GPOINTER_TO_INT (state->handle);
EnterCriticalSection (&data->io_lock);
list = g_hash_table_lookup (data->sock_to_state, GINT_TO_POINTER (fd));
if (list == NULL) {
list = g_slist_alloc ();
list->data = state;
epoll_op = EPOLL_CTL_ADD;
} else {
list = g_slist_append (list, state);
epoll_op = EPOLL_CTL_MOD;
}
ievt = get_events_from_list (list);
if ((ievt & MONO_POLLIN) != 0)
event.events |= EPOLLIN;
if ((ievt & MONO_POLLOUT) != 0)
event.events |= EPOLLOUT;
g_hash_table_replace (data->sock_to_state, state->handle, list);
event.data.fd = fd;
#ifdef EPOLL_DEBUG
g_print ("%s %d with %d\n", epoll_op == EPOLL_CTL_ADD ? "ADD" : "MOD", fd, event.events);
#endif
if (epoll_ctl (data->epollfd, epoll_op, fd, &event) == -1) {
int err = errno;
if (epoll_op == EPOLL_CTL_ADD && err == EEXIST) {
epoll_op = EPOLL_CTL_MOD;
if (epoll_ctl (data->epollfd, epoll_op, fd, &event) == -1) {
g_message ("epoll_ctl(MOD): %d %s\n", err, g_strerror (err));
}
}
}
LeaveCriticalSection (&data->io_lock);
return TRUE;
}
#endif
static void
socket_io_add (MonoAsyncResult *ares, MonoSocketAsyncResult *state)
{
socket_io_init (&socket_io_data);
state->ares = ares;
#ifdef HAVE_EPOLL
if (socket_io_data.epoll_disabled == FALSE) {
if (socket_io_add_epoll (state))
return;
}
#endif
socket_io_add_poll (state);
}
static gboolean
socket_io_filter (MonoObject *target, MonoObject *state)
{
gint op;
MonoSocketAsyncResult *sock_res = (MonoSocketAsyncResult *) state;
MonoClass *klass;
if (target == NULL || state == NULL)
return FALSE;
if (socket_async_call_klass == NULL) {
klass = target->vtable->klass;
/* Check if it's SocketAsyncCall in System
* FIXME: check the assembly is signed correctly for extra care
*/
if (klass->name [0] == 'S' && strcmp (klass->name, "SocketAsyncCall") == 0
&& strcmp (mono_image_get_name (klass->image), "System") == 0
&& klass->nested_in && strcmp (klass->nested_in->name, "Socket") == 0)
socket_async_call_klass = klass;
}
/* return both when socket_async_call_klass has not been seen yet and when
* the object is not an instance of the class.
*/
if (target->vtable->klass != socket_async_call_klass)
return FALSE;
op = sock_res->operation;
if (op < AIO_OP_FIRST || op >= AIO_OP_LAST)
return FALSE;
return TRUE;
}
static void
mono_async_invoke (MonoAsyncResult *ares)
{
ASyncCall *ac = (ASyncCall *)ares->data;
MonoThread *thread = NULL;
if (ares->execution_context) {
/* use captured ExecutionContext (if available) */
thread = mono_thread_current ();
ares->original_context = thread->execution_context;
thread->execution_context = ares->execution_context;
} else {
ares->original_context = NULL;
}
ac->msg->exc = NULL;
ac->res = mono_message_invoke (ares->async_delegate, ac->msg,
&ac->msg->exc, &ac->out_args);
ares->completed = 1;
/* call async callback if cb_method != null*/
if (ac->cb_method) {
MonoObject *exc = NULL;
void *pa = &ares;
mono_runtime_invoke (ac->cb_method, ac->cb_target, pa, &exc);
/* 'exc' will be the previous ac->msg->exc if not NULL and not
* catched. If catched, this will be set to NULL and the
* exception will not be printed. */
ac->msg->exc = exc;
}
/* restore original thread execution context if flow isn't suppressed, i.e. non null */
if (ares->original_context) {
thread->execution_context = ares->original_context;
ares->original_context = NULL;
}
/* notify listeners */
mono_monitor_enter ((MonoObject *) ares);
if (ares->handle != NULL) {
ac->wait_event = ((MonoWaitHandle *) ares->handle)->handle;
SetEvent (ac->wait_event);
}
mono_monitor_exit ((MonoObject *) ares);
EnterCriticalSection (&ares_lock);
mono_g_hash_table_remove (ares_htable, ares);
LeaveCriticalSection (&ares_lock);
}
void
mono_thread_pool_init ()
{
SYSTEM_INFO info;
int threads_per_cpu = THREADS_PER_CPU;
if ((int) InterlockedCompareExchange (&tp_inited, 1, 0) == 1)
return;
MONO_GC_REGISTER_ROOT (ares_htable);
InitializeCriticalSection (&socket_io_data.io_lock);
InitializeCriticalSection (&ares_lock);
ares_htable = mono_g_hash_table_new (NULL, NULL);
job_added = CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
GetSystemInfo (&info);
if (g_getenv ("MONO_THREADS_PER_CPU") != NULL) {
threads_per_cpu = atoi (g_getenv ("MONO_THREADS_PER_CPU"));
if (threads_per_cpu <= 0)
threads_per_cpu = THREADS_PER_CPU;
}
mono_max_worker_threads = 20 + threads_per_cpu * info.dwNumberOfProcessors;
}
MonoAsyncResult *
mono_thread_pool_add (MonoObject *target, MonoMethodMessage *msg, MonoDelegate *async_callback,
MonoObject *state)
{
MonoDomain *domain = mono_domain_get ();
MonoAsyncResult *ares;
ASyncCall *ac;
#ifdef HAVE_BOEHM_GC
ac = GC_MALLOC (sizeof (ASyncCall));
#else
/* We'll leak the event if creaated... */
ac = g_new0 (ASyncCall, 1);
#endif
ac->wait_event = NULL;
ac->msg = msg;
ac->state = state;
if (async_callback) {
ac->cb_method = mono_get_delegate_invoke (((MonoObject *)async_callback)->vtable->klass);
ac->cb_target = async_callback;
}
ares = mono_async_result_new (domain, NULL, ac->state, ac);
ares->async_delegate = target;
EnterCriticalSection (&ares_lock);
mono_g_hash_table_insert (ares_htable, ares, ares);
LeaveCriticalSection (&ares_lock);