mirror of
https://github.com/godotengine/godot.git
synced 2024-11-25 21:52:51 +00:00
448 lines
14 KiB
C++
448 lines
14 KiB
C++
/**************************************************************************/
|
|
/* message_queue.cpp */
|
|
/**************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/**************************************************************************/
|
|
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
|
|
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* 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 "message_queue.h"
|
|
|
|
#include "core/project_settings.h"
|
|
#include "core/script_language.h"
|
|
|
|
MessageQueue *MessageQueue::singleton = nullptr;
|
|
|
|
MessageQueue *MessageQueue::get_singleton() {
|
|
return singleton;
|
|
}
|
|
|
|
Error MessageQueue::push_call(ObjectID p_id, const StringName &p_method, const Variant **p_args, int p_argcount, bool p_show_error) {
|
|
_THREAD_SAFE_METHOD_
|
|
|
|
int room_needed = sizeof(Message) + sizeof(Variant) * p_argcount;
|
|
|
|
Buffer &buffer = buffers[write_buffer];
|
|
|
|
if ((buffer.end + room_needed) > buffer.data.size()) {
|
|
if ((buffer.end + room_needed) > max_allowed_buffer_size) {
|
|
String type;
|
|
if (ObjectDB::get_instance(p_id)) {
|
|
type = ObjectDB::get_instance(p_id)->get_class();
|
|
}
|
|
print_line("Failed method: " + p_method);
|
|
statistics();
|
|
ERR_FAIL_V_MSG(ERR_OUT_OF_MEMORY, "Message queue out of memory. Try increasing 'memory/limits/message_queue/max_size_mb' in project settings.");
|
|
} else {
|
|
buffer.data.resize(buffer.end + room_needed);
|
|
}
|
|
}
|
|
|
|
Message *msg = memnew_placement(&buffer.data[buffer.end], Message);
|
|
|
|
msg->args = p_argcount;
|
|
msg->instance_id = p_id;
|
|
msg->target = p_method;
|
|
msg->type = TYPE_CALL;
|
|
if (p_show_error) {
|
|
msg->type |= FLAG_SHOW_ERROR;
|
|
}
|
|
|
|
buffer.end += sizeof(Message);
|
|
|
|
for (int i = 0; i < p_argcount; i++) {
|
|
Variant *v = memnew_placement(&buffer.data[buffer.end], Variant);
|
|
buffer.end += sizeof(Variant);
|
|
*v = *p_args[i];
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
Error MessageQueue::push_call(ObjectID p_id, const StringName &p_method, VARIANT_ARG_DECLARE) {
|
|
VARIANT_ARGPTRS;
|
|
|
|
int argc = 0;
|
|
|
|
for (int i = 0; i < VARIANT_ARG_MAX; i++) {
|
|
if (argptr[i]->get_type() == Variant::NIL) {
|
|
break;
|
|
}
|
|
argc++;
|
|
}
|
|
|
|
return push_call(p_id, p_method, argptr, argc, false);
|
|
}
|
|
|
|
Error MessageQueue::push_set(ObjectID p_id, const StringName &p_prop, const Variant &p_value) {
|
|
_THREAD_SAFE_METHOD_
|
|
|
|
uint8_t room_needed = sizeof(Message) + sizeof(Variant);
|
|
|
|
Buffer &buffer = buffers[write_buffer];
|
|
|
|
if ((buffer.end + room_needed) > buffer.data.size()) {
|
|
if ((buffer.end + room_needed) > max_allowed_buffer_size) {
|
|
String type;
|
|
if (ObjectDB::get_instance(p_id)) {
|
|
type = ObjectDB::get_instance(p_id)->get_class();
|
|
}
|
|
print_line("Failed set: " + type + ":" + p_prop + " target ID: " + itos(p_id));
|
|
statistics();
|
|
ERR_FAIL_V_MSG(ERR_OUT_OF_MEMORY, "Message queue out of memory. Try increasing 'memory/limits/message_queue/max_size_mb' in project settings.");
|
|
} else {
|
|
buffer.data.resize(buffer.end + room_needed);
|
|
}
|
|
}
|
|
|
|
Message *msg = memnew_placement(&buffer.data[buffer.end], Message);
|
|
|
|
msg->args = 1;
|
|
msg->instance_id = p_id;
|
|
msg->target = p_prop;
|
|
msg->type = TYPE_SET;
|
|
|
|
buffer.end += sizeof(Message);
|
|
|
|
Variant *v = memnew_placement(&buffer.data[buffer.end], Variant);
|
|
buffer.end += sizeof(Variant);
|
|
*v = p_value;
|
|
|
|
return OK;
|
|
}
|
|
|
|
Error MessageQueue::push_notification(ObjectID p_id, int p_notification) {
|
|
_THREAD_SAFE_METHOD_
|
|
|
|
ERR_FAIL_COND_V(p_notification < 0, ERR_INVALID_PARAMETER);
|
|
|
|
uint8_t room_needed = sizeof(Message);
|
|
|
|
Buffer &buffer = buffers[write_buffer];
|
|
|
|
if ((buffer.end + room_needed) > buffer.data.size()) {
|
|
if ((buffer.end + room_needed) > max_allowed_buffer_size) {
|
|
String type;
|
|
if (ObjectDB::get_instance(p_id)) {
|
|
type = ObjectDB::get_instance(p_id)->get_class();
|
|
}
|
|
print_line("Failed notification: " + itos(p_notification) + " target ID: " + itos(p_id));
|
|
statistics();
|
|
ERR_FAIL_V_MSG(ERR_OUT_OF_MEMORY, "Message queue out of memory. Try increasing 'memory/limits/message_queue/max_size_mb' in project settings.");
|
|
} else {
|
|
buffer.data.resize(buffer.end + room_needed);
|
|
}
|
|
}
|
|
|
|
Message *msg = memnew_placement(&buffer.data[buffer.end], Message);
|
|
|
|
msg->type = TYPE_NOTIFICATION;
|
|
msg->instance_id = p_id;
|
|
//msg->target;
|
|
msg->notification = p_notification;
|
|
|
|
buffer.end += sizeof(Message);
|
|
|
|
return OK;
|
|
}
|
|
|
|
Error MessageQueue::push_call(Object *p_object, const StringName &p_method, VARIANT_ARG_DECLARE) {
|
|
return push_call(p_object->get_instance_id(), p_method, VARIANT_ARG_PASS);
|
|
}
|
|
|
|
Error MessageQueue::push_notification(Object *p_object, int p_notification) {
|
|
return push_notification(p_object->get_instance_id(), p_notification);
|
|
}
|
|
Error MessageQueue::push_set(Object *p_object, const StringName &p_prop, const Variant &p_value) {
|
|
return push_set(p_object->get_instance_id(), p_prop, p_value);
|
|
}
|
|
|
|
void MessageQueue::statistics() {
|
|
Map<StringName, int> set_count;
|
|
Map<int, int> notify_count;
|
|
Map<StringName, int> call_count;
|
|
int null_count = 0;
|
|
|
|
Buffer &buffer = buffers[write_buffer];
|
|
|
|
uint32_t read_pos = 0;
|
|
while (read_pos < buffer.end) {
|
|
Message *message = (Message *)&buffer.data[read_pos];
|
|
|
|
Object *target = ObjectDB::get_instance(message->instance_id);
|
|
|
|
if (target != nullptr) {
|
|
switch (message->type & FLAG_MASK) {
|
|
case TYPE_CALL: {
|
|
if (!call_count.has(message->target)) {
|
|
call_count[message->target] = 0;
|
|
}
|
|
|
|
call_count[message->target]++;
|
|
|
|
} break;
|
|
case TYPE_NOTIFICATION: {
|
|
if (!notify_count.has(message->notification)) {
|
|
notify_count[message->notification] = 0;
|
|
}
|
|
|
|
notify_count[message->notification]++;
|
|
|
|
} break;
|
|
case TYPE_SET: {
|
|
if (!set_count.has(message->target)) {
|
|
set_count[message->target] = 0;
|
|
}
|
|
|
|
set_count[message->target]++;
|
|
|
|
} break;
|
|
}
|
|
|
|
} else {
|
|
//object was deleted
|
|
print_line("Object was deleted while awaiting a callback");
|
|
|
|
null_count++;
|
|
}
|
|
|
|
read_pos += sizeof(Message);
|
|
if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
|
|
read_pos += sizeof(Variant) * message->args;
|
|
}
|
|
}
|
|
|
|
print_line("TOTAL BYTES: " + itos(buffer.end));
|
|
print_line("NULL count: " + itos(null_count));
|
|
|
|
for (Map<StringName, int>::Element *E = set_count.front(); E; E = E->next()) {
|
|
print_line("SET " + E->key() + ": " + itos(E->get()));
|
|
}
|
|
|
|
for (Map<StringName, int>::Element *E = call_count.front(); E; E = E->next()) {
|
|
print_line("CALL " + E->key() + ": " + itos(E->get()));
|
|
}
|
|
|
|
for (Map<int, int>::Element *E = notify_count.front(); E; E = E->next()) {
|
|
print_line("NOTIFY " + itos(E->key()) + ": " + itos(E->get()));
|
|
}
|
|
}
|
|
|
|
int MessageQueue::get_max_buffer_usage() const {
|
|
return _buffer_size_monitor.max_size_overall;
|
|
}
|
|
|
|
void MessageQueue::_call_function(Object *p_target, const StringName &p_func, const Variant *p_args, int p_argcount, bool p_show_error) {
|
|
const Variant **argptrs = nullptr;
|
|
if (p_argcount) {
|
|
argptrs = (const Variant **)alloca(sizeof(Variant *) * p_argcount);
|
|
for (int i = 0; i < p_argcount; i++) {
|
|
argptrs[i] = &p_args[i];
|
|
}
|
|
}
|
|
|
|
Variant::CallError ce;
|
|
p_target->call(p_func, argptrs, p_argcount, ce);
|
|
if (p_show_error && ce.error != Variant::CallError::CALL_OK) {
|
|
ERR_PRINT("Error calling deferred method: " + Variant::get_call_error_text(p_target, p_func, argptrs, p_argcount, ce) + ".");
|
|
}
|
|
}
|
|
|
|
void MessageQueue::_update_buffer_monitor() {
|
|
// The number of flushes is an approximate delay before
|
|
// considering shrinking. This is somewhat of a magic number,
|
|
// but only acts to prevent excessive oscillations.
|
|
if (++_buffer_size_monitor.flush_count == 8192) {
|
|
uint32_t max_size = _buffer_size_monitor.max_size;
|
|
|
|
// Uncomment this define to log message queue sizes and
|
|
// auto-shrinking behaviour.
|
|
// #define GODOT_DEBUG_MESSAGE_QUEUE_SIZES
|
|
#ifdef GODOT_DEBUG_MESSAGE_QUEUE_SIZES
|
|
print_line("MessageQueue buffer max size " + itos(max_size) + " bytes.");
|
|
#endif
|
|
|
|
// reset for next time
|
|
_buffer_size_monitor.flush_count = 0;
|
|
_buffer_size_monitor.max_size = 0;
|
|
|
|
for (uint32_t n = 0; n < 2; n++) {
|
|
uint32_t cap = buffers[n].data.get_capacity();
|
|
|
|
// Only worry about reducing memory if the capacity is high
|
|
// (due to e.g. loading a level or something).
|
|
// The shrinking will only take place below 256K, to prevent
|
|
// excessive reallocating.
|
|
if (cap > (256 * 1024)) {
|
|
// Only shrink if we are routinely using a lot less than the capacity.
|
|
if ((max_size * 4) < cap) {
|
|
buffers[n].data.reserve(cap / 2, true);
|
|
#ifdef GODOT_DEBUG_MESSAGE_QUEUE_SIZES
|
|
print_line("MessageQueue reducing buffer[" + itos(n) + "] capacity from " + itos(cap) + " bytes to " + itos(cap / 2) + " bytes.");
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void MessageQueue::flush() {
|
|
//using reverse locking strategy
|
|
_THREAD_SAFE_LOCK_
|
|
|
|
if (flushing) {
|
|
_THREAD_SAFE_UNLOCK_
|
|
ERR_FAIL_MSG("Already flushing"); //already flushing, you did something odd
|
|
}
|
|
|
|
// first flip buffers, in preparation
|
|
SWAP(read_buffer, write_buffer);
|
|
|
|
flushing = true;
|
|
_update_buffer_monitor();
|
|
_THREAD_SAFE_UNLOCK_
|
|
|
|
// This loop works by having a read buffer and write buffer.
|
|
// While we are reading from one buffer we can be filling another.
|
|
// This enables them to be independent, and not require locks per message.
|
|
// It also avoids pushing and resizing the write buffer corrupting the read buffer.
|
|
// The trade off is that it requires more memory.
|
|
// However the peak size of each can be lower, because they do not ADD
|
|
// to each other during transit.
|
|
|
|
while (buffers[read_buffer].data.size()) {
|
|
uint32_t read_pos = 0;
|
|
Buffer &buffer = buffers[read_buffer];
|
|
|
|
while (read_pos < buffer.end) {
|
|
Message *message = (Message *)&buffer.data[read_pos];
|
|
|
|
uint32_t advance = sizeof(Message);
|
|
if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
|
|
advance += sizeof(Variant) * message->args;
|
|
}
|
|
|
|
read_pos += advance;
|
|
|
|
Object *target = ObjectDB::get_instance(message->instance_id);
|
|
|
|
if (target != nullptr) {
|
|
switch (message->type & FLAG_MASK) {
|
|
case TYPE_CALL: {
|
|
Variant *args = (Variant *)(message + 1);
|
|
|
|
// messages don't expect a return value
|
|
|
|
_call_function(target, message->target, args, message->args, message->type & FLAG_SHOW_ERROR);
|
|
|
|
} break;
|
|
case TYPE_NOTIFICATION: {
|
|
// messages don't expect a return value
|
|
target->notification(message->notification);
|
|
|
|
} break;
|
|
case TYPE_SET: {
|
|
Variant *arg = (Variant *)(message + 1);
|
|
// messages don't expect a return value
|
|
target->set(message->target, *arg);
|
|
|
|
} break;
|
|
}
|
|
}
|
|
|
|
if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
|
|
Variant *args = (Variant *)(message + 1);
|
|
for (int i = 0; i < message->args; i++) {
|
|
args[i].~Variant();
|
|
}
|
|
}
|
|
|
|
message->~Message();
|
|
|
|
} // while going through buffer
|
|
|
|
buffer.end = 0; // reset buffer
|
|
|
|
uint32_t buffer_data_size = buffer.data.size();
|
|
buffer.data.clear();
|
|
|
|
_THREAD_SAFE_LOCK_
|
|
// keep track of the maximum used size, so we can downsize buffers when appropriate
|
|
_buffer_size_monitor.max_size = MAX(buffer_data_size, _buffer_size_monitor.max_size);
|
|
_buffer_size_monitor.max_size_overall = MAX(buffer_data_size, _buffer_size_monitor.max_size_overall);
|
|
|
|
// flip buffers, this is the only part that requires a lock
|
|
SWAP(read_buffer, write_buffer);
|
|
_THREAD_SAFE_UNLOCK_
|
|
|
|
} // while read buffer not empty
|
|
|
|
_THREAD_SAFE_LOCK_
|
|
flushing = false;
|
|
_THREAD_SAFE_UNLOCK_
|
|
}
|
|
|
|
bool MessageQueue::is_flushing() const {
|
|
return flushing;
|
|
}
|
|
|
|
MessageQueue::MessageQueue() {
|
|
ERR_FAIL_COND_MSG(singleton != nullptr, "A MessageQueue singleton already exists.");
|
|
singleton = this;
|
|
flushing = false;
|
|
|
|
max_allowed_buffer_size = GLOBAL_DEF_RST("memory/limits/message_queue/max_size_mb", 32);
|
|
ProjectSettings::get_singleton()->set_custom_property_info("memory/limits/message_queue/max_size_mb", PropertyInfo(Variant::INT, "memory/limits/message_queue/max_size_mb", PROPERTY_HINT_RANGE, "4,512,1,or_greater"));
|
|
|
|
max_allowed_buffer_size *= 1024 * 1024;
|
|
}
|
|
|
|
MessageQueue::~MessageQueue() {
|
|
for (int which = 0; which < 2; which++) {
|
|
Buffer &buffer = buffers[which];
|
|
uint32_t read_pos = 0;
|
|
|
|
while (read_pos < buffer.end) {
|
|
Message *message = (Message *)&buffer.data[read_pos];
|
|
Variant *args = (Variant *)(message + 1);
|
|
int argc = message->args;
|
|
if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
|
|
for (int i = 0; i < argc; i++) {
|
|
args[i].~Variant();
|
|
}
|
|
}
|
|
message->~Message();
|
|
|
|
read_pos += sizeof(Message);
|
|
if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION) {
|
|
read_pos += sizeof(Variant) * message->args;
|
|
}
|
|
}
|
|
|
|
} // for which
|
|
|
|
singleton = nullptr;
|
|
}
|