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Add ref-counted buffer byte_slice. Currently used for sending TCP data.

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This commit is contained in:
Lee Clagett 2019-05-11 11:38:35 -04:00
parent cdfa2e58df
commit bdfc63ae4d
13 changed files with 882 additions and 153 deletions
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147
contrib/epee/include/net/levin_protocol_handler_async.h
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@ -136,7 +136,6 @@ public:
critical_section m_local_inv_buff_lock;
std::string m_local_inv_buff;
critical_section m_send_lock;
critical_section m_call_lock;
volatile uint32_t m_wait_count;
@ -260,6 +259,34 @@ public:
return handler->is_timer_started();
}
template<class callback_t> friend struct anvoke_handler;
static bucket_head2 make_header(uint32_t command, uint64_t msg_size, uint32_t flags, bool expect_response) noexcept
{
bucket_head2 head = {0};
head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
head.m_have_to_return_data = expect_response;
head.m_cb = SWAP64LE(msg_size);
head.m_command = SWAP32LE(command);
head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
head.m_flags = SWAP32LE(flags);
return head;
}
bool send_message(uint32_t command, epee::span<const uint8_t> in_buff, uint32_t flags, bool expect_response)
{
const bucket_head2 head = make_header(command, in_buff.size(), flags, expect_response);
if(!m_pservice_endpoint->do_send(byte_slice{as_byte_span(head), in_buff}))
return false;
MDEBUG(m_connection_context << "LEVIN_PACKET_SENT. [len=" << head.m_cb
<< ", flags" << head.m_flags
<< ", r?=" << head.m_have_to_return_data
<<", cmd = " << head.m_command
<< ", ver=" << head.m_protocol_version);
return true;
}
public:
async_protocol_handler(net_utils::i_service_endpoint* psnd_hndlr,
config_type& config,
@ -458,37 +485,22 @@ public:
if(m_current_head.m_have_to_return_data)
{
std::string return_buff;
m_current_head.m_return_code = m_config.m_pcommands_handler->invoke(
m_current_head.m_command,
buff_to_invoke,
return_buff,
m_connection_context);
m_current_head.m_cb = return_buff.size();
m_current_head.m_have_to_return_data = false;
m_current_head.m_protocol_version = LEVIN_PROTOCOL_VER_1;
m_current_head.m_flags = LEVIN_PACKET_RESPONSE;
#if BYTE_ORDER == LITTLE_ENDIAN
std::string send_buff((const char*)&m_current_head, sizeof(m_current_head));
#else
bucket_head2 head = m_current_head;
head.m_signature = SWAP64LE(head.m_signature);
head.m_cb = SWAP64LE(head.m_cb);
head.m_command = SWAP32LE(head.m_command);
head.m_return_code = SWAP32LE(head.m_return_code);
head.m_flags = SWAP32LE(head.m_flags);
head.m_protocol_version = SWAP32LE(head.m_protocol_version);
std::string send_buff((const char*)&head, sizeof(head));
#endif
send_buff += return_buff;
CRITICAL_REGION_BEGIN(m_send_lock);
if(!m_pservice_endpoint->do_send(send_buff.data(), send_buff.size()))
const uint32_t return_code = m_config.m_pcommands_handler->invoke(
m_current_head.m_command, buff_to_invoke, return_buff, m_connection_context
);
bucket_head2 head = make_header(m_current_head.m_command, return_buff.size(), LEVIN_PACKET_RESPONSE, false);
head.m_return_code = SWAP32LE(return_code);
return_buff.insert(0, reinterpret_cast<const char*>(&head), sizeof(head));
if(!m_pservice_endpoint->do_send(byte_slice{std::move(return_buff)}))
return false;
CRITICAL_REGION_END();
MDEBUG(m_connection_context << "LEVIN_PACKET_SENT. [len=" << m_current_head.m_cb
<< ", flags" << m_current_head.m_flags
<< ", r?=" << m_current_head.m_have_to_return_data
<<", cmd = " << m_current_head.m_command
<< ", ver=" << m_current_head.m_protocol_version);
MDEBUG(m_connection_context << "LEVIN_PACKET_SENT. [len=" << head.m_cb
<< ", flags" << head.m_flags
<< ", r?=" << head.m_have_to_return_data
<<", cmd = " << head.m_command
<< ", ver=" << head.m_protocol_version);
}
else
m_config.m_pcommands_handler->notify(m_current_head.m_command, buff_to_invoke, m_connection_context);
@ -584,26 +596,10 @@ public:
break;
}
bucket_head2 head = {0};
head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
head.m_cb = SWAP64LE(in_buff.size());
head.m_have_to_return_data = true;
head.m_flags = SWAP32LE(LEVIN_PACKET_REQUEST);
head.m_command = SWAP32LE(command);
head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
boost::interprocess::ipcdetail::atomic_write32(&m_invoke_buf_ready, 0);
CRITICAL_REGION_BEGIN(m_send_lock);
CRITICAL_REGION_LOCAL1(m_invoke_response_handlers_lock);
if(!m_pservice_endpoint->do_send(&head, sizeof(head)))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send");
err_code = LEVIN_ERROR_CONNECTION;
break;
}
CRITICAL_REGION_BEGIN(m_invoke_response_handlers_lock);
if(!m_pservice_endpoint->do_send(in_buff.data(), in_buff.size()))
if(!send_message(command, in_buff, LEVIN_PACKET_REQUEST, true))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send");
err_code = LEVIN_ERROR_CONNECTION;
@ -642,36 +638,14 @@ public:
if(m_deletion_initiated)
return LEVIN_ERROR_CONNECTION_DESTROYED;
bucket_head2 head = {0};
head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
head.m_cb = SWAP64LE(in_buff.size());
head.m_have_to_return_data = true;
head.m_flags = SWAP32LE(LEVIN_PACKET_REQUEST);
head.m_command = SWAP32LE(command);
head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
boost::interprocess::ipcdetail::atomic_write32(&m_invoke_buf_ready, 0);
CRITICAL_REGION_BEGIN(m_send_lock);
if(!m_pservice_endpoint->do_send(&head, sizeof(head)))
if (!send_message(command, in_buff, LEVIN_PACKET_REQUEST, true))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send");
LOG_ERROR_CC(m_connection_context, "Failed to send request");
return LEVIN_ERROR_CONNECTION;
}
if(!m_pservice_endpoint->do_send(in_buff.data(), in_buff.size()))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send");
return LEVIN_ERROR_CONNECTION;
}
CRITICAL_REGION_END();
MDEBUG(m_connection_context << "LEVIN_PACKET_SENT. [len=" << head.m_cb
<< ", f=" << head.m_flags
<< ", r?=" << head.m_have_to_return_data
<< ", cmd = " << head.m_command
<< ", ver=" << head.m_protocol_version);
uint64_t ticks_start = misc_utils::get_tick_count();
size_t prev_size = 0;
@ -716,33 +690,12 @@ public:
if(m_deletion_initiated)
return LEVIN_ERROR_CONNECTION_DESTROYED;
bucket_head2 head = {0};
head.m_signature = SWAP64LE(LEVIN_SIGNATURE);
head.m_have_to_return_data = false;
head.m_cb = SWAP64LE(in_buff.size());
head.m_command = SWAP32LE(command);
head.m_protocol_version = SWAP32LE(LEVIN_PROTOCOL_VER_1);
head.m_flags = SWAP32LE(LEVIN_PACKET_REQUEST);
CRITICAL_REGION_BEGIN(m_send_lock);
if(!m_pservice_endpoint->do_send(&head, sizeof(head)))
if (!send_message(command, in_buff, LEVIN_PACKET_REQUEST, false))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send()");
LOG_ERROR_CC(m_connection_context, "Failed to send notify message");
return -1;
}
if(!m_pservice_endpoint->do_send(in_buff.data(), in_buff.size()))
{
LOG_ERROR_CC(m_connection_context, "Failed to do_send()");
return -1;
}
CRITICAL_REGION_END();
LOG_DEBUG_CC(m_connection_context, "LEVIN_PACKET_SENT. [len=" << head.m_cb <<
", f=" << head.m_flags <<
", r?=" << head.m_have_to_return_data <<
", cmd = " << head.m_command <<
", ver=" << head.m_protocol_version);
return 1;
}
//------------------------------------------------------------------------------------------