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/*
+----------------------------------------------------------------------+
| Swoole |
+----------------------------------------------------------------------+
| This source file is subject to version 2.0 of the Apache license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.apache.org/licenses/LICENSE-2.0.html |
| If you did not receive a copy of the Apache2.0 license and are unable|
| to obtain it through the world-wide-web, please send a note to |
| license@swoole.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Tianfeng Han <rango@swoole.com> |
+----------------------------------------------------------------------+
*/
#pragma once
#include "swoole_api.h"
#include "swoole_string.h"
#include "swoole_socket.h"
#include <unordered_map>
namespace swoole {
struct PipeBuffer {
DataHead info;
char data[0];
bool is_begin() {
return info.flags & SW_EVENT_DATA_BEGIN;
}
bool is_chunked() {
return info.flags & SW_EVENT_DATA_CHUNK;
}
bool is_end() {
return info.flags & SW_EVENT_DATA_END;
}
};
struct PacketPtr {
size_t length;
char *data;
};
struct DgramPacket {
SocketType socket_type;
network::Address socket_addr;
uint32_t length;
char data[0];
};
struct PacketTask {
size_t length;
char tmpfile[SW_TASK_TMP_PATH_SIZE];
};
class MessageBus {
private:
const Allocator *allocator_;
std::unordered_map<uint64_t, std::shared_ptr<String>> packet_pool_;
std::function<uint64_t(void)> id_generator_;
size_t buffer_size_;
PipeBuffer *buffer_ = nullptr;
bool always_chunked_transfer_ = false;
String *get_packet_buffer();
ReturnCode prepare_packet(uint16_t &recv_chunk_count, String *packet_buffer);
public:
MessageBus() {
allocator_ = sw_std_allocator();
buffer_size_ = SW_BUFFER_SIZE_STD;
}
~MessageBus() {
}
bool empty() {
return packet_pool_.empty();
}
size_t count() {
return packet_pool_.size();
}
void clear() {
packet_pool_.clear();
}
void set_allocator(const Allocator *allocator) {
allocator_ = allocator;
}
void set_id_generator(const std::function<uint64_t(void)> &id_generator) {
id_generator_ = id_generator;
}
void set_buffer_size(size_t buffer_size) {
buffer_size_ = buffer_size;
}
void set_always_chunked_transfer() {
always_chunked_transfer_ = true;
}
size_t get_buffer_size() {
return buffer_size_;
}
size_t get_memory_size();
bool alloc_buffer() {
void *_ptr = allocator_->malloc(sizeof(*buffer_) + buffer_size_);
if (_ptr) {
buffer_ = (PipeBuffer *) _ptr;
sw_memset_zero(&buffer_->info, sizeof(buffer_->info));
return true;
} else {
return false;
}
}
/**
* If use the zend_string_allocator, must manually call this function to release the memory,
* otherwise coredump will occur when php shutdown, because zend_string has been released
*/
void free_buffer() {
allocator_->free(buffer_);
}
void pass(SendData *task) {
memcpy(&buffer_->info, &task->info, sizeof(buffer_->info));
if (task->info.len > 0) {
buffer_->info.flags = SW_EVENT_DATA_PTR;
PacketPtr pkt{task->info.len, (char *) task->data};
buffer_->info.len = sizeof(pkt);
memcpy(buffer_->data, &pkt, sizeof(pkt));
}
}
/**
* Send data to socket. If the data sent is larger than Server::ipc_max_size, then it is sent in chunks.
* Otherwise send it directly.
* @return: send success returns true, send failure returns false.
*/
bool write(network::Socket *sock, SendData *packet);
/**
* Receive data from socket, if only one chunk is received, packet will be saved in packet_pool.
* Then continue to listen to readable events, waiting for more chunks.
* @return: >0: receive a complete packet, 0: continue to wait for data, -1: an error occurred
*/
ssize_t read(network::Socket *sock);
/**
* Receive data from pipeline, and store data to buffer
* @return: >0: receive a complete packet, 0: continue to wait for data, -1: an error occurred
*/
ssize_t read_with_buffer(network::Socket *sock);
/**
* The last chunk of data has been received, return address and length, start processing this packet.
*/
PacketPtr get_packet() const;
PipeBuffer *get_buffer() {
return buffer_;
}
/**
* Pop the data memory address to the outer layer, no longer managed by MessageBus
*/
char *move_packet() {
uint64_t msg_id = buffer_->info.msg_id;
auto iter = packet_pool_.find(msg_id);
if (iter != packet_pool_.end()) {
auto str = iter->second.get();
char *val = str->str;
str->str = nullptr;
return val;
} else {
return nullptr;
}
}
/**
* The processing of this data packet has been completed, and the relevant memory has been released
*/
void pop() {
if (buffer_->is_end()) {
packet_pool_.erase(buffer_->info.msg_id);
}
}
};
} // namespace swoole
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