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Added XSI shared memory

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[SVN r67451]
This commit is contained in:
Ion Gaztañaga
2010-12-26 09:53:56 +00:00
parent a86d42120e
commit 005b78950b
19 changed files with 1031 additions and 255 deletions
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40
example/doc_managed_copy_on_write.cpp
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@@ -8,28 +8,50 @@
//
//////////////////////////////////////////////////////////////////////////////
#include <boost/interprocess/detail/config_begin.hpp>
#include <boost/interprocess/detail/os_file_functions.hpp>
//[doc_managed_copy_on_write
#include <boost/interprocess/managed_mapped_file.hpp>
#include <fstream> //std::fstream
#include <iterator>//std::distance
//<-
#include "../test/get_process_id_name.hpp"
//->
int main()
{
using namespace boost::interprocess;
//Define file names
//<-
#if 1
std::string managed_file(boost::interprocess::detail::get_temporary_path());
managed_file += "/"; managed_file += test::get_process_id_name();
const char *ManagedFile = managed_file.c_str();
std::string managed_file2(boost::interprocess::detail::get_temporary_path());
managed_file2 += "/"; managed_file2 += test::get_process_id_name(); managed_file2 += "_2";
const char *ManagedFile2 = managed_file2.c_str();
#else
//->
const char *ManagedFile = "MyManagedFile";
const char *ManagedFile2 = "MyManagedFile2";
//<-
#endif
//->
//Try to erase any previous managed segment with the same name
file_mapping::remove("MyManagedFile");
file_mapping::remove("MyManagedFile2");
remove_file_on_destroy destroyer1("MyManagedFile");
remove_file_on_destroy destroyer2("MyManagedFile2");
file_mapping::remove(ManagedFile);
file_mapping::remove(ManagedFile2);
remove_file_on_destroy destroyer1(ManagedFile);
remove_file_on_destroy destroyer2(ManagedFile2);
{
//Create an named integer in a managed mapped file
managed_mapped_file managed_file(create_only, "MyManagedFile", 65536);
managed_mapped_file managed_file(create_only, ManagedFile, 65536);
managed_file.construct<int>("MyInt")(0u);
//Now create a copy on write version
managed_mapped_file managed_file_cow(open_copy_on_write, "MyManagedFile");
managed_mapped_file managed_file_cow(open_copy_on_write, ManagedFile);
//Erase the int and create a new one
if(!managed_file_cow.destroy<int>("MyInt"))
@@ -45,20 +67,20 @@ int main()
throw int(0);
{ //Dump the modified copy on write segment to a file
std::fstream file("MyManagedFile2", std::ios_base::out | std::ios_base::binary);
std::fstream file(ManagedFile2, std::ios_base::out | std::ios_base::binary);
if(!file)
throw int(0);
file.write(static_cast<const char *>(managed_file_cow.get_address()), managed_file_cow.get_size());
}
//Now open the modified file and test changes
managed_mapped_file managed_file_cow2(open_only, "MyManagedFile2");
managed_mapped_file managed_file_cow2(open_only, ManagedFile2);
if(managed_file_cow2.find<int>("MyInt").first && !managed_file_cow2.find<int>("MyInt2").first)
throw int(0);
}
{
//Now create a read-only version
managed_mapped_file managed_file_ro(open_read_only, "MyManagedFile");
managed_mapped_file managed_file_ro(open_read_only, ManagedFile);
//Check the original is intact
if(!managed_file_ro.find<int>("MyInt").first && managed_file_ro.find<int>("MyInt2").first)