mirror of https://github.com/davisking/dlib.git
57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
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/*
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This is an example illustrating the use of the dlib::std_allocator object.
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In this example we will create the necessary typedefs to give the
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dlib::std_allocator object to the standard string and vector objects
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in the STL. Thus we will create versions of std::string and std::vector
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that perform all their memory allocations and deallocations via one of
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the dlib memory manager objects.
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*/
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// include everything we need for this example
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#include <vector>
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#include <iostream>
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#include <string>
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#include "dlib/std_allocator.h"
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#include "dlib/memory_manager.h"
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#include "dlib/memory_manager_stateless.h"
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using namespace std;
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using namespace dlib;
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int main()
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{
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// Make a typedef for an allocator that uses the thread safe memory_manager_stateless object with a
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// global memory pool. This version of the memory_manager_stateless object keeps everything it allocates
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// in a global memory pool and doesn't release any memory until the program terminates.
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typedef std_allocator<char, memory_manager_stateless<char>::kernel_2_3a> alloc_char_with_global_memory_pool;
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// Now make a typedef for a C++ standard string that uses our new allocator type
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typedef std::basic_string<char, char_traits<char>, alloc_char_with_global_memory_pool > dstring;
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// typedef another allocator for dstring objects
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typedef std_allocator<dstring, memory_manager_stateless<char>::kernel_2_3a> alloc_dstring_with_global_memory_pool;
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// Now make a typedef for a C++ standard vector that uses our new allocator type and also contains the new dstring
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typedef std::vector<dstring, alloc_dstring_with_global_memory_pool > dvector;
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// Now we can use the string and vector we have as we normally would. So for example, I can make a
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// dvector and add 4 strings into it like so:
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dvector v;
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v.push_back("one");
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v.push_back("two");
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v.push_back("three");
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v.push_back("four");
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// And now we print out the contents of our vector
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for (unsigned long i = 0; i < v.size(); ++i)
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{
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cout << v[i] << endl;
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}
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}
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