From dc86ace85e437ecb8a2e728e4dce36d02bbb8a6e Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期五, 23 四月 2021 12:59:50 +0800
Subject: [PATCH] move ref count into msg meta, only 1 poinetr now.
---
src/msg.cpp | 164 ++++++++++++++++--------------------------------------
1 files changed, 48 insertions(+), 116 deletions(-)
diff --git a/src/msg.cpp b/src/msg.cpp
index 41dd459..ba844da 100644
--- a/src/msg.cpp
+++ b/src/msg.cpp
@@ -20,144 +20,76 @@
namespace bhome_msg
{
-
+/*TODO change msg format, header has proc info;
+reply has errer msg
+ center accept request and route.;
+//*/
const uint32_t kMsgTag = 0xf1e2d3c4;
-const uint32_t kMsgPrefixLen = 4;
-BHMsg InitMsg(MsgType type)
+void *MsgI::Alloc(SharedMemory &shm, const size_t size)
{
- BHMsg msg;
- msg.set_type(type);
- time_t tm = 0;
- msg.set_timestamp(time(&tm));
- return msg;
-}
-
-BHMsg MakeRequest(const MQId &src_id, const void *data, const size_t size)
-{
- assert(data && size);
- BHMsg msg(InitMsg(kMsgTypeRequest));
- msg.set_body(data, size);
- msg.add_route()->set_mq_id(&src_id, sizeof(src_id));
- return msg;
-}
-BHMsg MakeRequest(const MQId &src_id, const std::string &topic, const void *data, const size_t size)
-{
- DataRequest req;
- req.set_topic(topic);
- req.set_data(data, size);
- const std::string &body(req.SerializeAsString());
- return MakeRequest(src_id, body.data(), body.size());
-}
-
-BHMsg MakeReply(const void *data, const size_t size)
-{
- assert(data && size);
- BHMsg msg(InitMsg(kMsgTypeReply));
- DataReply reply;
- reply.set_data(data, size);
- msg.set_body(reply.SerializeAsString());
- return msg;
-}
-
-BHMsg MakeSubUnsub(const MQId &client, const std::vector<std::string> &topics, const MsgType sub_unsub)
-{
- assert(sub_unsub == kMsgTypeSubscribe || sub_unsub == kMsgTypeUnsubscribe);
- BHMsg msg(InitMsg(sub_unsub));
- msg.add_route()->set_mq_id(&client, sizeof(client));
- DataSub subs;
- for (auto &t : topics) {
- subs.add_topics(t);
- }
- msg.set_body(subs.SerializeAsString());
- return msg;
-}
-
-BHMsg MakeSub(const MQId &client, const std::vector<std::string> &topics) { return MakeSubUnsub(client, topics, kMsgTypeSubscribe); }
-BHMsg MakeUnsub(const MQId &client, const std::vector<std::string> &topics) { return MakeSubUnsub(client, topics, kMsgTypeUnsubscribe); }
-
-BHMsg MakePub(const std::string &topic, const void *data, const size_t size)
-{
- assert(data && size);
- BHMsg msg(InitMsg(kMsgTypePublish));
- DataPub pub;
- pub.set_topic(topic);
- pub.set_data(data, size);
- msg.set_body(pub.SerializeAsString());
- return msg;
-}
-
-BHMsg MakeQueryTopic(const std::string &topic)
-{
- BHMsg msg(InitMsg(kMsgTypeQueryTopic));
- DataQueryTopic query;
- query.set_topic(topic);
- msg.set_body(query.SerializeAsString());
- return msg;
-}
-
-void *Pack(SharedMemory &shm, const BHMsg &msg)
-{
- uint32_t msg_size = msg.ByteSizeLong();
- void *p = shm.Alloc(4 + msg_size);
+ void *p = shm.Alloc(sizeof(Meta) + size);
if (p) {
- Put32(p, msg_size);
- if (!msg.SerializeToArray(static_cast<char *>(p) + kMsgPrefixLen, msg_size)) {
- shm.Dealloc(p);
- p = 0;
- }
+ auto pmeta = new (p) Meta;
+ p = pmeta + 1;
}
return p;
}
-
-bool MsgI::Unpack(BHMsg &msg) const
+void MsgI::Free(SharedMemory &shm)
{
- void *p = ptr_.get();
+ assert(valid());
+ shm.Dealloc(meta());
+ ptr_ = nullptr;
+ assert(!valid());
+}
+
+void *MsgI::Pack(SharedMemory &shm,
+ const uint32_t head_len, const ToArray &headToArray,
+ const uint32_t body_len, const ToArray &bodyToArray)
+{
+ void *addr = Alloc(shm, sizeof(head_len) + head_len + sizeof(body_len) + body_len);
+ if (addr) {
+ auto p = static_cast<char *>(addr);
+ auto Pack1 = [&p](auto len, auto &writer) {
+ Put32(p, len);
+ p += sizeof(len);
+ writer(p, len);
+ p += len;
+ };
+ Pack1(head_len, headToArray);
+ Pack1(body_len, bodyToArray);
+ }
+ return addr;
+}
+
+bool MsgI::ParseHead(BHMsgHead &head) const
+{
+ auto p = get<char>();
assert(p);
uint32_t msg_size = Get32(p);
- return msg.ParseFromArray(static_cast<char *>(p) + kMsgPrefixLen, msg_size);
+ p += 4;
+ return head.ParseFromArray(p, msg_size);
}
-// with ref count;
-bool MsgI::MakeRC(SharedMemory &shm, const BHMsg &msg)
+bool MsgI::Make(SharedMemory &shm, void *p)
{
- void *p = Pack(shm, msg);
if (!p) {
return false;
}
- RefCount *rc = shm.New<RefCount>();
- if (!rc) {
- shm.Dealloc(p);
- return false;
- }
- MsgI(p, rc).swap(*this);
- return true;
-}
-
-bool MsgI::Make(SharedMemory &shm, const BHMsg &msg)
-{
- void *p = Pack(shm, msg);
- if (!p) {
- return false;
- }
- MsgI(p, 0).swap(*this);
+ MsgI(p).swap(*this);
return true;
}
int MsgI::Release(SharedMemory &shm)
{
- if (IsCounted()) {
- const int n = count_->Dec();
- if (n != 0) {
- return n;
- }
+ if (!valid()) {
+ return 0;
}
- // free data
- shm.Dealloc(ptr_);
- ptr_ = 0;
- shm.Delete(count_);
- count_ = 0;
- return 0;
+ auto n = meta()->count_.Dec();
+ if (n == 0) {
+ Free(shm);
+ }
+ return n;
}
} // namespace bhome_msg
--
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