From db322f33ba13592f2492317e3f1a070454c97059 Mon Sep 17 00:00:00 2001
From: lichao <lichao@aiotlink.com>
Date: 星期四, 13 五月 2021 19:34:46 +0800
Subject: [PATCH] center alloc all msgs.
---
src/msg.h | 109 +++++++++++++++++++++++++++++++++---------------------
1 files changed, 66 insertions(+), 43 deletions(-)
diff --git a/src/msg.h b/src/msg.h
index 1f5b0f1..9589389 100644
--- a/src/msg.h
+++ b/src/msg.h
@@ -26,6 +26,7 @@
#include <functional>
#include <stdint.h>
+class ShmSocket;
namespace bhome_msg
{
using namespace bhome_shm;
@@ -35,8 +36,9 @@
class ShmMsg : private StaticDataRef<SharedMemory, ShmMsg>
{
-private:
static inline SharedMemory &shm() { return GetData(); }
+ static ShmSocket &Sender();
+
// store ref count, msgs shareing the same data should also hold a pointer of the same RefCount object.
class RefCount : private boost::noncopyable
{
@@ -49,6 +51,7 @@
int Dec() { return --num_; }
int Get() { return num_.load(); }
};
+
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); }
@@ -60,14 +63,22 @@
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 size_ = 0;
+ const int64_t id_ = 0;
+ std::atomic<int64_t> timestamp_;
Meta(uint32_t size) :
- size_(size) {}
+ size_(size), id_(NewId()), timestamp_(NowSec()) {}
};
OffsetType offset_;
- void *Alloc(const size_t size)
+ static void *Alloc(const size_t size)
{
void *p = shm().Alloc(sizeof(Meta) + size);
if (p) {
@@ -76,45 +87,33 @@
}
return p;
}
- void Free()
- {
- assert(valid());
- shm().Dealloc(meta());
- offset_ = 0;
- assert(!valid());
- }
+
+private:
Meta *meta() const { return get<Meta>() - 1; }
typedef std::function<void(void *p, int len)> ToArray;
- void *Pack(const uint32_t head_len, const ToArray &headToArray,
- const uint32_t body_len, const ToArray &bodyToArray)
+
+ template <class Body>
+ void *Pack(const BHMsgHead &head, const uint32_t head_len, const Body &body, const uint32_t body_len)
{
- void *addr = Alloc(sizeof(head_len) + head_len + sizeof(body_len) + body_len);
+ void *addr = get();
if (addr) {
auto p = static_cast<char *>(addr);
- auto Pack1 = [&p](auto len, auto &writer) {
+ 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);
+ Pack1(head_len, [&](void *p, int len) { head.SerializeToArray(p, len); });
+ Pack1(body_len, [&](void *p, int len) { body.SerializeToArray(p, len); });
}
return addr;
}
- template <class Body>
- void *Pack(const BHMsgHead &head, const Body &body)
- {
- return Pack(
- uint32_t(head.ByteSizeLong()), [&](void *p, int len) { head.SerializeToArray(p, len); },
- uint32_t(body.ByteSizeLong()), [&](void *p, int len) { body.SerializeToArray(p, len); });
- }
-
void *Pack(const std::string &content)
{
- void *addr = Alloc(content.size());
+ void *addr = get();
if (addr) {
memcpy(addr, content.data(), content.size());
}
@@ -133,36 +132,48 @@
offset_(p ? (Addr(p) - BaseAddr()) : 0) {}
template <class T = void>
- T *get() const { return static_cast<T *>(Ptr(offset_ + BaseAddr())); }
+ T *get() const { return offset_ != 0 ? static_cast<T *>(Ptr(offset_ + BaseAddr())) : nullptr; }
public:
static bool BindShm(SharedMemory &shm) { return SetData(shm); }
ShmMsg() :
- ShmMsg(nullptr) {}
+ offset_(0) {}
explicit ShmMsg(const OffsetType offset) :
offset_(offset) {}
OffsetType Offset() const { return offset_; }
OffsetType &OffsetRef() { return offset_; }
void swap(ShmMsg &a) { std::swap(offset_, a.offset_); }
- bool valid() const { return static_cast<bool>(offset_) && meta()->tag_ == kMsgTag; }
-
- int AddRef() const { return valid() ? meta()->count_.Inc() : 1; }
- int Release()
- {
- if (!valid()) {
- return 0;
- }
- auto n = meta()->count_.Dec();
- if (n == 0) {
- Free();
- }
- return n;
- }
+ 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();
template <class Body>
- inline bool Make(const BHMsgHead &head, const Body &body) { return Make(Pack(head, body)); }
- inline bool Make(const std::string &content) { return Make(Pack(content)); }
+ 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);
+ }
+ 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()->size_ >= size) && Pack(head, head_len, body, body_len);
+ }
+
+ inline bool Make(const std::string &content) { return Make(content.size()) && Pack(content); }
+ inline bool Fill(const std::string &content) { return valid() && (meta()->size_ >= content.size()) && Pack(content); }
+
+ 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)
{
@@ -208,6 +219,18 @@
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 59bit 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
#endif // end of include guard: MSG_5BILLZET
--
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