From 5bb28835d06e27dbd960916c9fb11a555fc5a9bc Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期一, 26 四月 2021 14:24:29 +0800
Subject: [PATCH] add shared lib target.
---
src/shm_queue.cpp | 151 +++++++++++++++++++++++++-------------------------
1 files changed, 76 insertions(+), 75 deletions(-)
diff --git a/src/shm_queue.cpp b/src/shm_queue.cpp
index 77add97..face18b 100644
--- a/src/shm_queue.cpp
+++ b/src/shm_queue.cpp
@@ -15,96 +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 {
-
+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()(); }
-}
-
-ShmMsgQueue::ShmMsgQueue(const MQId &id, ShmType &segment, const uint32_t len):
-SharedQueue(segment, MsgQIdToName(id), id, len, segment.get_segment_manager())
+namespace
{
- printf("queue size: %ld cap: %ld\n", data()->size(), data()->capacity());
-}
-
-ShmMsgQueue::ShmMsgQueue(ShmType &segment, const uint32_t len):ShmMsgQueue(NewId(), segment, len)
-{}
-
-ShmMsgQueue::~ShmMsgQueue()
+std::string MsgQIdToName(const ShmMsgQueue::MQId id)
{
- Remove();
+ char buf[40] = "mqOx";
+ int n = sprintf(buf + 4, "%lx", id);
+ return std::string(buf, n + 4);
}
-bool ShmMsgQueue::Send(const MQId &remote_id, const Msg &msg, const int timeout_ms)
+const int AdjustMQLength(const int len)
{
- Queue *remote = find(MsgQIdToName(remote_id));
-
- if(!remote) {
- return false;
- }
- msg.AddRef();
- if (remote->Write(msg, timeout_ms)) {
- return true;
- } else {
- msg.RemoveRef();
- return false;
- }
+ const int kMaxLength = 10000;
+ const int kDefaultLen = 12;
+ if (len <= 0) {
+ return kDefaultLen;
+ } else if (len < kMaxLength) {
+ return len;
+ } else {
+ return kMaxLength;
+ }
}
-bool ShmMsgQueue::Send(const MQId &remote_id, const void *data, const size_t size, const int timeout_ms)
+} // namespace
+
+ShmMsgQueue::MQId ShmMsgQueue::NewId()
{
- // 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.
-
- Msg msg;
- if (msg.Build(shm(), Id(), data, size, false)) {
- if (Send(remote_id, msg, timeout_ms)) {
- return true;
- } else {
- if (msg.RemoveRef() == 0) { // works for both refcounted and not counted.
- msg.FreeFrom(shm());
- }
- }
- }
- return false;
+ static auto &id = GetData();
+ return ++id;
}
-
-bool ShmMsgQueue::Recv(MQId &source_id, void *&data, size_t &size, const int timeout_ms)
+// ShmMsgQueue memory usage: (320 + 16*length) bytes, length >= 2
+ShmMsgQueue::ShmMsgQueue(const MQId id, ShmType &segment, const int len) :
+ id_(id),
+ queue_(segment, MsgQIdToName(id_), AdjustMQLength(len), segment.get_segment_manager())
{
- Msg msg;
- if (Read(msg, timeout_ms)) {
- DEFER1(if (msg.RemoveRef() == 0) { msg.FreeFrom(shm()); });
-
- auto ptr = msg.get<char>();
- if (ptr) {
- MsgMetaV1 meta;
- meta.Parse(ptr);
- source_id = meta.src_id_;
- 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;
}
+
+ShmMsgQueue::ShmMsgQueue(ShmType &segment, const int len) :
+ id_(NewId()),
+ queue_(segment, true, MsgQIdToName(id_), AdjustMQLength(len), segment.get_segment_manager())
+{
+ if (!queue_.IsOk()) {
+ throw("error create msgq " + std::to_string(id_));
+ }
+}
+
+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 Shmq::Remove(shm, MsgQIdToName(id));
+}
+
+ShmMsgQueue::Queue *ShmMsgQueue::Find(SharedMemory &shm, const MQId remote_id)
+{
+ return Shmq::Find(shm, MsgQIdToName(remote_id));
+}
+
+bool ShmMsgQueue::TrySend(SharedMemory &shm, const MQId remote_id, const MsgI &msg, OnSend const &onsend)
+{
+ 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.
} // namespace bhome_shm
-
--
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