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Implement shmem msg zero-copy

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This commit is contained in:
Alexey Rybalchenko
2021-07-14 10:46:12 +02:00
committed by Dennis Klein
parent c57410b820
commit bce380d871
7 changed files with 333 additions and 100 deletions
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17
fairmq/shmem/Common.h
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@@ -146,9 +146,10 @@ struct MetaHeader
{
size_t fSize;
size_t fHint;
uint16_t fRegionId;
uint16_t fSegmentId;
boost::interprocess::managed_shared_memory::handle_t fHandle;
mutable boost::interprocess::managed_shared_memory::handle_t fShared;
uint16_t fRegionId;
mutable uint16_t fSegmentId;
};
#ifdef FAIRMQ_DEBUG_MODE
@@ -271,22 +272,22 @@ struct SegmentHandleFromAddress : public boost::static_visitor<boost::interproce
const void* ptr;
};
struct SegmentAddressFromHandle : public boost::static_visitor<void*>
struct SegmentAddressFromHandle : public boost::static_visitor<char*>
{
SegmentAddressFromHandle(const boost::interprocess::managed_shared_memory::handle_t _handle) : handle(_handle) {}
template<typename S>
void* operator()(S& s) const { return s.get_address_from_handle(handle); }
char* operator()(S& s) const { return reinterpret_cast<char*>(s.get_address_from_handle(handle)); }
const boost::interprocess::managed_shared_memory::handle_t handle;
};
struct SegmentAllocate : public boost::static_visitor<void*>
struct SegmentAllocate : public boost::static_visitor<char*>
{
SegmentAllocate(const size_t _size) : size(_size) {}
template<typename S>
void* operator()(S& s) const { return s.allocate(size); }
char* operator()(S& s) const { return reinterpret_cast<char*>(s.allocate(size)); }
const size_t size;
};
@@ -322,12 +323,12 @@ struct SegmentBufferShrink : public boost::static_visitor<char*>
struct SegmentDeallocate : public boost::static_visitor<>
{
SegmentDeallocate(void* _ptr) : ptr(_ptr) {}
SegmentDeallocate(char* _ptr) : ptr(_ptr) {}
template<typename S>
void operator()(S& s) const { return s.deallocate(ptr); }
void* ptr;
char* ptr;
};
} // namespace fair::mq::shmem