From c6964d5af25d4ec7ed9dbe7674dc4e3896b36ead Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期五, 16 四月 2021 16:10:02 +0800
Subject: [PATCH] node remove mq if never registered; refactor.
---
src/shm_queue.cpp | 137 +++++++++++++++++++++++++--------------------
1 files changed, 75 insertions(+), 62 deletions(-)
diff --git a/src/shm_queue.cpp b/src/shm_queue.cpp
index 263fd94..78fdaec 100644
--- a/src/shm_queue.cpp
+++ b/src/shm_queue.cpp
@@ -15,84 +15,97 @@
*
* =====================================================================================
*/
-#include "shm_queue.h"
-#include <boost/uuid/uuid_io.hpp>
-#include <boost/uuid/uuid_generators.hpp>
-#include "bh_util.h"
-namespace bhome_shm {
-
+#include "shm_queue.h"
+#include "bh_util.h"
+#include <boost/uuid/uuid_generators.hpp>
+#include <boost/uuid/uuid_io.hpp>
+
+// TODO !!! add garbage collection, and handshake with gc-center.
+// smart pointer will NOT work if user crash.
+// problem of process release mq: client query success; server exits; client send.
+// client query success; server exits; client send.
+
+namespace bhome_shm
+{
+using namespace bhome_msg;
using namespace boost::interprocess;
using namespace boost::uuids;
-namespace {
-std::string MsgQIdToName(const MQId& id) { return "shmq" + to_string(id); }
-MQId EmptyId() { return nil_uuid(); }
+namespace
+{
+std::string MsgQIdToName(const MQId &id) { return "shmq" + to_string(id); }
+// MQId EmptyId() { return nil_uuid(); }
MQId NewId() { return random_generator()(); }
-}
-
-ShmMsgQueue::ShmMsgQueue(const MQId &id, ShmType &segment, const uint32_t len):
-SharedQueue(segment, MsgQIdToName(id), id, len, segment.get_segment_manager())
+const int AdjustMQLength(const int len)
{
- printf("queue size: %ld cap: %ld\n", data()->size(), data()->capacity());
+ const int kMaxLength = 10000;
+ const int kDefaultLen = 12;
+ if (len <= 0) {
+ return kDefaultLen;
+ } else if (len < kMaxLength) {
+ return len;
+ } else {
+ return kMaxLength;
+ }
}
-ShmMsgQueue::ShmMsgQueue(ShmType &segment, const uint32_t len):ShmMsgQueue(NewId(), segment, len)
-{}
+} // namespace
-ShmMsgQueue::~ShmMsgQueue()
+// ShmMsgQueue memory usage: (320 + 16*length) bytes, length >= 2
+ShmMsgQueue::ShmMsgQueue(const MQId &id, ShmType &segment, const int len) :
+ Super(segment, MsgQIdToName(id), AdjustMQLength(len), segment.get_segment_manager()),
+ id_(id)
{
- Remove();
}
-bool ShmMsgQueue::Send(const MQId &remote_id, const void *data, const size_t size, const int timeout_ms)
+ShmMsgQueue::ShmMsgQueue(ShmType &segment, const int len) :
+ ShmMsgQueue(NewId(), segment, len) {}
+
+ShmMsgQueue::~ShmMsgQueue() {}
+
+bool ShmMsgQueue::Remove(SharedMemory &shm, const MQId &id)
{
- if (data && size) {
- Queue *remote = find(MsgQIdToName(remote_id));
- if (remote) {
- void *p = shm().allocate(sizeof(MsgMetaV1) + size, std::nothrow);
- bool r = false;
- if (p) {
- MsgMetaV1 meta;
- meta.data_size_ = size;
- memcpy(meta.src_id_, &Id(), sizeof(MQId));
- meta.Pack(p);
-
- memcpy(static_cast<char*>(p) + sizeof(meta), data, size);
- if (remote->Write(p, timeout_ms)) {
- return true;
- } else {
- shm().deallocate(p);
- }
- }
- }
- }
- return false;
+ return Super::Remove(shm, MsgQIdToName(id));
}
-bool ShmMsgQueue::Recv(MQId &source_id, void *&data, size_t &size, const int timeout_ms)
+ShmMsgQueue::Queue *ShmMsgQueue::FindRemote(SharedMemory &shm, const MQId &remote_id)
{
- Msg msg;
- if (Read(msg, timeout_ms)) {
- auto ptr = msg.get<char>();
- if (ptr) {
- DEFER1(shm().deallocate(ptr););
- MsgMetaV1 meta;
- meta.Parse(ptr);
- memcpy(&source_id, meta.src_id_, sizeof(MQId));
- size = meta.data_size_;
- data = malloc(size);
- if (data) {
- memcpy(data, ptr + meta.self_size_, size);
- return true;
- }
- }
- }
- source_id = EmptyId();
- data = 0;
- size = 0;
- return false;
+ return Find(shm, MsgQIdToName(remote_id));
}
+bool ShmMsgQueue::Send(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, const int timeout_ms, OnSend const &onsend)
+{
+ Queue *remote = FindRemote(shm, remote_id);
+ if (remote) {
+ if (onsend) {
+ return remote->Write(msg, timeout_ms, [&onsend](const MsgI &msg) { onsend(); msg.AddRef(); });
+ } else {
+ return remote->Write(msg, timeout_ms, [](const MsgI &msg) { msg.AddRef(); });
+ }
+ } else {
+ // SetLestError(eNotFound);
+ return false;
+ }
+}
+
+bool ShmMsgQueue::TrySend(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, OnSend const &onsend)
+{
+ Queue *remote = FindRemote(shm, remote_id);
+ if (remote) {
+ if (onsend) {
+ return remote->TryWrite(msg, [&onsend](const MsgI &msg) { onsend(); msg.AddRef(); });
+ } else {
+ return remote->TryWrite(msg, [](const MsgI &msg) { msg.AddRef(); });
+ }
+ } else {
+ // SetLestError(eNotFound);
+ return false;
+ }
+}
+
+// Test shows that in the 2 cases:
+// 1) build msg first, then find remote queue;
+// 2) find remote queue first, then build msg;
+// 1 is about 50% faster than 2, maybe cache related.
} // namespace bhome_shm
-
--
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