From 1fbfef2a51db4a3bac9d8a5b87af94a40a913b7a Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期日, 25 四月 2021 15:33:40 +0800
Subject: [PATCH] change mqid from uuid to uint64.
---
src/shm_queue.cpp | 75 ++++++++++++++++++++-----------------
1 files changed, 40 insertions(+), 35 deletions(-)
diff --git a/src/shm_queue.cpp b/src/shm_queue.cpp
index 521f773..1be8021 100644
--- a/src/shm_queue.cpp
+++ b/src/shm_queue.cpp
@@ -18,25 +18,21 @@
#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(); }
-MQId NewId() { return random_generator()(); }
+std::string MsgQIdToName(const ShmMsgQueue::MQId id)
+{
+ char buf[40] = "mqOx";
+ int n = sprintf(buf + 4, "%lx", id);
+ return std::string(buf, n + 4);
+}
+
const int AdjustMQLength(const int len)
{
const int kMaxLength = 10000;
@@ -52,49 +48,58 @@
} // namespace
+ShmMsgQueue::MQId ShmMsgQueue::NewId()
+{
+ static auto &id = GetData();
+ return ++id;
+}
// ShmMsgQueue memory usage: (320 + 16*length) bytes, length >= 2
-ShmMsgQueue::ShmMsgQueue(const MQId &id, ShmType &segment, const int len) :
+ShmMsgQueue::ShmMsgQueue(const MQId id, ShmType &segment, const int len) :
Super(segment, MsgQIdToName(id), AdjustMQLength(len), segment.get_segment_manager()),
id_(id)
{
}
ShmMsgQueue::ShmMsgQueue(ShmType &segment, const int len) :
- ShmMsgQueue(NewId(), segment, len)
+ ShmMsgQueue(NewId(), segment, len) {}
+
+ShmMsgQueue::~ShmMsgQueue() {}
+
+bool ShmMsgQueue::Remove(SharedMemory &shm, const MQId id)
{
+ Queue *q = Find(shm, id);
+ if (q) {
+ MsgI msg;
+ while (q->TryRead(msg)) {
+ msg.Release();
+ }
+ }
+ return Super::Remove(shm, MsgQIdToName(id));
}
-ShmMsgQueue::~ShmMsgQueue()
+ShmMsgQueue::Queue *ShmMsgQueue::Find(SharedMemory &shm, const MQId remote_id)
{
- // It's not safe to remove, others may still holder pointers and write to it.
- // TODO use smart_ptr or garbage collection.
- //Remove();
+ return Super::Find(shm, MsgQIdToName(remote_id));
}
-bool ShmMsgQueue::Send(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, const int timeout_ms, OnSend const &onsend)
+bool ShmMsgQueue::TrySend(SharedMemory &shm, const MQId remote_id, const MsgI &msg, OnSend const &onsend)
{
- Queue *remote = Find(shm, MsgQIdToName(remote_id));
- return remote && remote->Write(msg, timeout_ms, [&onsend](const MsgI &msg) { onsend(); msg.AddRef(); });
-}
-bool ShmMsgQueue::Send(SharedMemory &shm, const MQId &remote_id, const MsgI &msg, const int timeout_ms)
-{
- Queue *remote = Find(shm, MsgQIdToName(remote_id));
- return remote && remote->Write(msg, timeout_ms, [](const MsgI &msg) { msg.AddRef(); });
+ Queue *remote = Find(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.
-
-// bool ShmMsgQueue::Recv(MsgI &imsg, BHMsgHead &head, const int timeout_ms)
-// {
-// if (Read(imsg, timeout_ms)) {
-// // DEFER1(imsg.Release(shm()););
-// return imsg.ParseHead(head);
-// } else {
-// return false;
-// }
-// }
} // namespace bhome_shm
--
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