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#define XERR "memoryaccess"
#include "memoryaccess.ih"
// returns the ID of a newly allocated shmget memory block
// by create.cc, get.cc
// static
int MemoryAccess::getID(size_t sharedSegmentSize, size_t access)
{
int id = shmget(IPC_PRIVATE, sharedSegmentSize, access);
if (id == -1) // no block available
throw Exception{} << XERR ": cannot get a shared segment of " <<
sharedSegmentSize << " bytes";
if (size_t size = getSegmentSize(id); size != sharedSegmentSize)
throw Exception{} << XERR ": incorrect size (" << size <<
", should be: " << sharedSegmentSize <<
") of shared segment";
return id;
}
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