How to use hash_map in shared memory
0
I want to do inter process communication using shared memory. In the shared memory I want to use hash_map. Is it possible to create hash_map in shared memory?
c++ windows stl shared-memory
asked Nov 13 '18 at 7:36
MrunalMrunal
647
add a comment |
0
I want to do inter process communication using shared memory. In the shared memory I want to use hash_map. Is it possible to create hash_map in shared memory?
c++ windows stl shared-memory
asked Nov 13 '18 at 7:36
MrunalMrunal
647
1
There is no standard C++ component calledhash_map, so I guess you are using some particular library - you would need to consult the documentation for that library to see if it supports creating the map nodes in a particular area of memory.
– BoBTFish
Nov 13 '18 at 7:38
1
Are you using the original Standard Template Library? It's mostly obsolete these days, and basically all its functionality (and more) have been incorporated into the standard library. For examplehas_mapisstd::unordered_map.
– Some programmer dude
Nov 13 '18 at 7:43
And if you usestd::unordered_mapthen you need to provide a custom allocator that "allocates" memory from the shared memory, otherwise it will allocate from the heap and the data wont be shared. In general, dealing with dynamic structures of any kind is not trivial when used together with all kinds of IPC, especially shared memory.
– Some programmer dude
Nov 13 '18 at 7:45
3
Ifboostis an option, you might want to look into boost::interprocess
– Gaurav Sehgal
Nov 13 '18 at 7:56
add a comment |
0
0
0
I want to do inter process communication using shared memory. In the shared memory I want to use hash_map. Is it possible to create hash_map in shared memory?
c++ windows stl shared-memory
asked Nov 13 '18 at 7:36
MrunalMrunal
647
I want to do inter process communication using shared memory. In the shared memory I want to use hash_map. Is it possible to create hash_map in shared memory?
c++ windows stl shared-memory
c++ windows stl shared-memory
asked Nov 13 '18 at 7:36
MrunalMrunal
647
asked Nov 13 '18 at 7:36
MrunalMrunal
647
asked Nov 13 '18 at 7:36
MrunalMrunal
647
asked Nov 13 '18 at 7:36
MrunalMrunal
647
asked Nov 13 '18 at 7:36
MrunalMrunal
647
647
1
There is no standard C++ component calledhash_map, so I guess you are using some particular library - you would need to consult the documentation for that library to see if it supports creating the map nodes in a particular area of memory.
– BoBTFish
Nov 13 '18 at 7:38
1
Are you using the original Standard Template Library? It's mostly obsolete these days, and basically all its functionality (and more) have been incorporated into the standard library. For examplehas_mapisstd::unordered_map.
– Some programmer dude
Nov 13 '18 at 7:43
And if you usestd::unordered_mapthen you need to provide a custom allocator that "allocates" memory from the shared memory, otherwise it will allocate from the heap and the data wont be shared. In general, dealing with dynamic structures of any kind is not trivial when used together with all kinds of IPC, especially shared memory.
– Some programmer dude
Nov 13 '18 at 7:45
3
Ifboostis an option, you might want to look into boost::interprocess
– Gaurav Sehgal
Nov 13 '18 at 7:56
add a comment |
1
There is no standard C++ component calledhash_map, so I guess you are using some particular library - you would need to consult the documentation for that library to see if it supports creating the map nodes in a particular area of memory.
– BoBTFish
Nov 13 '18 at 7:38
1
Are you using the original Standard Template Library? It's mostly obsolete these days, and basically all its functionality (and more) have been incorporated into the standard library. For examplehas_mapisstd::unordered_map.
– Some programmer dude
Nov 13 '18 at 7:43
And if you usestd::unordered_mapthen you need to provide a custom allocator that "allocates" memory from the shared memory, otherwise it will allocate from the heap and the data wont be shared. In general, dealing with dynamic structures of any kind is not trivial when used together with all kinds of IPC, especially shared memory.
– Some programmer dude
Nov 13 '18 at 7:45
3
Ifboostis an option, you might want to look into boost::interprocess
– Gaurav Sehgal
Nov 13 '18 at 7:56
1
1
There is no standard C++ component called
hash_map, so I guess you are using some particular library - you would need to consult the documentation for that library to see if it supports creating the map nodes in a particular area of memory.– BoBTFish
Nov 13 '18 at 7:38
There is no standard C++ component called
hash_map, so I guess you are using some particular library - you would need to consult the documentation for that library to see if it supports creating the map nodes in a particular area of memory.– BoBTFish
Nov 13 '18 at 7:38
1
1
Are you using the original Standard Template Library? It's mostly obsolete these days, and basically all its functionality (and more) have been incorporated into the standard library. For example
has_map is std::unordered_map.– Some programmer dude
Nov 13 '18 at 7:43
Are you using the original Standard Template Library? It's mostly obsolete these days, and basically all its functionality (and more) have been incorporated into the standard library. For example
has_map is std::unordered_map.– Some programmer dude
Nov 13 '18 at 7:43
And if you use
std::unordered_map then you need to provide a custom allocator that "allocates" memory from the shared memory, otherwise it will allocate from the heap and the data wont be shared. In general, dealing with dynamic structures of any kind is not trivial when used together with all kinds of IPC, especially shared memory.– Some programmer dude
Nov 13 '18 at 7:45
And if you use
std::unordered_map then you need to provide a custom allocator that "allocates" memory from the shared memory, otherwise it will allocate from the heap and the data wont be shared. In general, dealing with dynamic structures of any kind is not trivial when used together with all kinds of IPC, especially shared memory.– Some programmer dude
Nov 13 '18 at 7:45
3
3
If
boost is an option, you might want to look into boost::interprocess– Gaurav Sehgal
Nov 13 '18 at 7:56
If
boost is an option, you might want to look into boost::interprocess– Gaurav Sehgal
Nov 13 '18 at 7:56
add a comment |
1 Answer
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You can use the boost::interprocess library. It supports interprocess communication through sharing and supports advanced concepts such as shared memory containers.
answered Nov 13 '18 at 9:13
darunedarune
1,048516
add a comment |
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You can use the boost::interprocess library. It supports interprocess communication through sharing and supports advanced concepts such as shared memory containers.
answered Nov 13 '18 at 9:13
darunedarune
1,048516
add a comment |
0
You can use the boost::interprocess library. It supports interprocess communication through sharing and supports advanced concepts such as shared memory containers.
answered Nov 13 '18 at 9:13
darunedarune
1,048516
add a comment |
0
0
0
You can use the boost::interprocess library. It supports interprocess communication through sharing and supports advanced concepts such as shared memory containers.
answered Nov 13 '18 at 9:13
darunedarune
1,048516
You can use the boost::interprocess library. It supports interprocess communication through sharing and supports advanced concepts such as shared memory containers.
answered Nov 13 '18 at 9:13
darunedarune
1,048516
answered Nov 13 '18 at 9:13
darunedarune
1,048516
answered Nov 13 '18 at 9:13
darunedarune
1,048516
answered Nov 13 '18 at 9:13
darunedarune
1,048516
1,048516
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1
There is no standard C++ component called
hash_map, so I guess you are using some particular library - you would need to consult the documentation for that library to see if it supports creating the map nodes in a particular area of memory.– BoBTFish
Nov 13 '18 at 7:38
1
Are you using the original Standard Template Library? It's mostly obsolete these days, and basically all its functionality (and more) have been incorporated into the standard library. For example
has_mapisstd::unordered_map.– Some programmer dude
Nov 13 '18 at 7:43
And if you use
std::unordered_mapthen you need to provide a custom allocator that "allocates" memory from the shared memory, otherwise it will allocate from the heap and the data wont be shared. In general, dealing with dynamic structures of any kind is not trivial when used together with all kinds of IPC, especially shared memory.– Some programmer dude
Nov 13 '18 at 7:45
3
If
boostis an option, you might want to look into boost::interprocess– Gaurav Sehgal
Nov 13 '18 at 7:56