From 58d904a328c0d849769b483e901a0be9426b8209 Mon Sep 17 00:00:00 2001
From: liuxiaolong <liuxiaolong@aiotlink.com>
Date: 星期二, 20 七月 2021 20:20:44 +0800
Subject: [PATCH] 调整Request C.BHFree的位置
---
src/msg.h | 326 ++++++++++++++++++++++++++++++++++++++---------------
1 files changed, 233 insertions(+), 93 deletions(-)
diff --git a/src/msg.h b/src/msg.h
index 661d989..3ca20d4 100644
--- a/src/msg.h
+++ b/src/msg.h
@@ -21,116 +21,242 @@
#include "bh_util.h"
#include "proto.h"
#include "shm.h"
-#include <boost/interprocess/offset_ptr.hpp>
-#include <boost/uuid/uuid_generators.hpp>
-#include <functional>
+#include <atomic>
#include <stdint.h>
+class ShmSocket;
namespace bhome_msg
{
using namespace bhome_shm;
-using namespace bhome::msg; // for serialized data in MsgI
-// MsgI is safe to be stored in shared memory, so POD data or offset_ptr is required.
-// message format: header(meta) + body(data).
+// ShmMsg is safe to be stored in shared memory, so POD data or offset_ptr is required.
+// message content layout: (meta) / header_size + header + data_size + data
-typedef boost::uuids::uuid MQId;
-
-// store ref count, msgs shareing the same data should also hold a pointer of the same RefCount object.
-class RefCount : private boost::noncopyable
-{
-public:
- int Inc()
- {
- Guard lk(mutex_);
- return ++num_;
- }
- int Dec()
- {
- Guard lk(mutex_);
- return --num_;
- }
- int Get()
- {
- Guard lk(mutex_);
- return num_;
- }
-
-private:
- Mutex mutex_;
- int num_ = 1;
-};
-
-// message content layout: header_size + header + data_size + data
-class MsgI
+class ShmMsg
{
private:
- offset_ptr<void> ptr_;
- offset_ptr<RefCount> count_;
-
- typedef std::function<void(void *p, int len)> ToArray;
- void *Pack(SharedMemory &shm,
- const uint32_t head_len, const ToArray &headToArray,
- const uint32_t body_len, const ToArray &bodyToArray);
-
- template <class Body>
- void *Pack(SharedMemory &shm, const BHMsgHead &head, const Body &body)
+ // store ref count, msgs shareing the same data should also hold a pointer of the same RefCount object.
+ class RefCount : private boost::noncopyable
{
- return Pack(
- shm,
- uint32_t(head.ByteSizeLong()), [&](void *p, int len) { head.SerializeToArray(p, len); },
- uint32_t(body.ByteSizeLong()), [&](void *p, int len) { body.SerializeToArray(p, len); });
- }
+ std::atomic<int> num_;
- bool MakeRC(SharedMemory &shm, void *addr);
- bool Make(SharedMemory &shm, void *addr);
+ public:
+ RefCount() :
+ num_(1) { }
+ // num_(1) { static_assert(std::is_pod<decltype(num_)>::value); }
+ int Inc() { return ++num_; }
+ int Dec() { return --num_; }
+ int Get() { return num_.load(); }
+ };
-public:
- MsgI(void *p = 0, RefCount *c = 0) :
- ptr_(p), count_(c) {}
+ typedef int64_t OffsetType;
+ static OffsetType Addr(void *ptr) { return reinterpret_cast<OffsetType>(ptr); }
+ static void *Ptr(const OffsetType offset) { return reinterpret_cast<void *>(offset); }
+ OffsetType BaseAddr() const { return Addr(shm().get_address()); }
- void swap(MsgI &a)
- {
- std::swap(ptr_, a.ptr_);
- std::swap(count_, a.count_);
- }
- template <class T = void>
- T *get() { return static_cast<T *>(ptr_.get()); }
-
- // AddRef and Release works for both counted and not counted msg.
- int AddRef() const { return IsCounted() ? count_->Inc() : 1; }
- int Release(SharedMemory &shm);
-
- int Count() const { return IsCounted() ? count_->Get() : 1; }
- bool IsCounted() const { return static_cast<bool>(count_); }
-
- template <class Body>
- bool Make(SharedMemory &shm, const BHMsgHead &head, const Body &body)
- {
- return Make(shm, Pack(shm, head, body));
- }
- template <class Body>
- bool MakeRC(SharedMemory &shm, const BHMsgHead &head, const Body &body)
- {
- return MakeRC(shm, Pack(shm, head, body));
- }
- bool MakeRC(SharedMemory &shm, MsgI &a)
- {
- if (a.IsCounted()) {
- *this = a;
- AddRef();
- return true;
- } else {
- void *p = a.ptr_.get();
- a.ptr_ = 0;
- return MakeRC(shm, p);
+ static const uint32_t kMsgTag = 0xf1e2d3c4;
+ struct Meta {
+ static int64_t NewId()
+ {
+ static std::atomic<int64_t> id(0);
+ return ++id;
}
+
+ RefCount count_;
+ const uint32_t tag_ = kMsgTag;
+ const uint32_t capacity_ = 0;
+ const int64_t id_ = 0;
+ std::atomic<int64_t> timestamp_;
+ bool managed_ = false;
+ uint32_t size_ = 0;
+ Meta(uint32_t size) :
+ capacity_(size), id_(NewId()), timestamp_(NowSec()) {}
+ };
+ OffsetType offset_;
+ SharedMemory *pshm_;
+
+ void *Alloc(const size_t size, const void *src = nullptr)
+ {
+ void *p = shm().Alloc(sizeof(Meta) + size);
+ if (p) {
+ auto pmeta = new (p) Meta(size);
+ p = pmeta + 1;
+ if (src) {
+ memcpy(p, src, size);
+ }
+ }
+ return p;
}
- bool ParseHead(BHMsgHead &head) const;
+
+private:
+ Meta *meta() const { return get<Meta>() - 1; }
+
+ template <class Body>
+ void *Pack(const BHMsgHead &head, const uint32_t head_len, const Body &body, const uint32_t body_len)
+ {
+ void *addr = get();
+ 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, [&](void *p, int len) { head.SerializeToArray(p, len); });
+ Pack1(body_len, [&](void *p, int len) { body.SerializeToArray(p, len); });
+ meta()->size_ = 4 + head_len + 4 + body_len;
+ }
+ return addr;
+ }
+ void *Pack(const BHMsgHead &head, const uint32_t head_len, const std::string &body_content)
+ {
+ void *addr = get();
+ if (addr) {
+ auto p = static_cast<char *>(addr);
+ auto Pack1 = [&p](uint32_t len, auto &&writer) {
+ Put32(p, len);
+ p += sizeof(len);
+ writer(p, len);
+ p += len;
+ };
+ Pack1(head_len, [&](void *p, int len) { head.SerializeToArray(p, len); });
+ Pack1(body_content.size(), [&](void *p, int len) { memcpy(p, body_content.data(), len); });
+ meta()->size_ = 4 + head_len + 4 + body_content.size();
+ }
+ return addr;
+ }
+
+ void *Pack(const void *src, const size_t size)
+ {
+ void *addr = get();
+ if (addr && src) {
+ memcpy(addr, src, size);
+ meta()->size_ = size;
+ }
+ return addr;
+ }
+
+ void *Pack(const std::string &content) { return Pack(content.data(), content.size()); }
+
+ bool Make(void *addr)
+ {
+ if (!addr) {
+ return false;
+ }
+ offset_ = Addr(addr) - BaseAddr();
+ return true;
+ }
+
+ template <class T = void>
+ T *get() const { return offset_ != 0 ? static_cast<T *>(Ptr(offset_ + BaseAddr())) : nullptr; }
+
+public:
+ explicit ShmMsg(SharedMemory &shm) :
+ offset_(0), pshm_(&shm) {}
+ ShmMsg(const OffsetType offset, SharedMemory &shm) :
+ offset_(offset), pshm_(&shm) {}
+ OffsetType Offset() const { return offset_; }
+ OffsetType &OffsetRef() { return offset_; }
+ SharedMemory &shm() const { return *pshm_; }
+
+ void swap(ShmMsg &a)
+ {
+ std::swap(offset_, a.offset_);
+ std::swap(pshm_, a.pshm_);
+ }
+ bool valid() const { return offset_ != 0 && meta()->tag_ == kMsgTag; }
+ int64_t id() const { return valid() ? meta()->id_ : 0; }
+ int64_t timestamp() const { return valid() ? meta()->timestamp_.load() : 0; }
+ size_t Size() const { return valid() ? meta()->size_ : 0; }
+ int Count() const { return valid() ? meta()->count_.Get() : 1; }
+ int AddRef() const { return valid() ? meta()->count_.Inc() : 1; }
+ int Release();
+ void Free();
+ void reset_managed(const bool val) const
+ {
+ if (valid()) { meta()->managed_ = val; }
+ }
+
+ template <class Body>
+ inline bool Make(const BHMsgHead &head, const Body &body)
+ {
+ uint32_t head_len = head.ByteSizeLong();
+ uint32_t body_len = body.ByteSizeLong();
+ uint32_t size = sizeof(head_len) + head_len + sizeof(body_len) + body_len;
+ return Make(size) && Pack(head, head_len, body, body_len);
+ }
+ inline bool Make(const BHMsgHead &head, const std::string &body_content)
+ {
+ uint32_t head_len = head.ByteSizeLong();
+ uint32_t size = sizeof(head_len) + head_len + sizeof(uint32_t) + body_content.size();
+ return Make(size) && Pack(head, head_len, body_content);
+ }
+
+ template <class Body>
+ inline bool Fill(const BHMsgHead &head, const Body &body)
+ {
+ uint32_t head_len = head.ByteSizeLong();
+ uint32_t body_len = body.ByteSizeLong();
+ uint32_t size = sizeof(head_len) + head_len + sizeof(body_len) + body_len;
+ return valid() && (meta()->capacity_ >= size) && Pack(head, head_len, body, body_len);
+ }
+
+ inline bool Make(const void *src, const size_t size) { return Make(Alloc(size, src)); }
+ inline bool Fill(const void *src, const size_t size) { return valid() && (meta()->capacity_ >= size) && Pack(src, size); }
+
+ inline bool Make(const std::string &content) { return Make(content.data(), content.size()); }
+ inline bool Fill(const std::string &content) { return Fill(content.data(), content.size()); }
+
+ inline bool Make(const size_t size) { return Make(Alloc(size)); }
+
+ template <class Body>
+ static inline std::string Serialize(const BHMsgHead &head, const Body &body)
+ {
+ uint32_t head_len = head.ByteSizeLong();
+ uint32_t body_len = body.ByteSizeLong();
+ std::string s(4 + head_len + 4 + body_len, '\0');
+ size_t pos = 0;
+ auto add1 = [&](auto &&msg, auto &&size) {
+ Put32(&s[pos], size);
+ pos += 4;
+ msg.SerializeToArray(&s[pos], size);
+ pos += size;
+ };
+ add1(head, head_len);
+ add1(body, body_len);
+ assert(pos == s.size());
+ return s;
+ }
+
+ bool ParseHead(BHMsgHead &head) const
+ {
+ auto p = get<char>();
+ assert(p);
+ uint32_t msg_size = Get32(p);
+ p += 4;
+ return head.ParseFromArray(p, msg_size);
+ }
+ std::string content() const
+ {
+ auto p = get<char>();
+ return p ? std::string(p, meta()->size_) : std::string();
+ }
+ std::string body() const
+ {
+ auto p = get<char>();
+ assert(p);
+ uint32_t size = Get32(p);
+ p += 4;
+ p += size;
+ size = Get32(p);
+ p += 4;
+ return std::string(p, size);
+ }
template <class Body>
bool ParseBody(Body &body) const
{
- auto p = static_cast<char *>(ptr_.get());
+ auto p = get<char>();
assert(p);
uint32_t size = Get32(p);
p += 4;
@@ -141,7 +267,21 @@
}
};
-inline void swap(MsgI &m1, MsgI &m2) { m1.swap(m2); }
+inline void swap(ShmMsg &m1, ShmMsg &m2) { m1.swap(m2); }
+
+typedef ShmMsg MsgI;
+
+constexpr inline int EncodeCmd(int cmd) { return ((cmd & MaskBits(3)) << 1) | 1; }
+constexpr inline int DecodeCmd(int64_t msg) { return (msg >> 1) & MaskBits(3); }
+constexpr inline bool IsCmd(int64_t msg) { return (msg & 1) != 0; }
+// int64_t pack format: cmd data ,3bit cmd, 1bit flag.
+enum MsgCmd {
+ eCmdNodeInit = 0, // upto 56bit ssn id
+ eCmdNodeInitReply = 1, // 31bit proc index,
+ eCmdAllocRequest0 = 2, // 8bit size, 4bit socket index, 16bit proc index, 28bit id
+ eCmdAllocReply0 = 3, // 31bit ptr, 28bit id,
+ eCmdFree = 4, // upto 59bit msg id,
+};
} // namespace bhome_msg
--
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