Open-Harbor/osrm-backend
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 3 Wiki Activity

make shmem swappable by ref and ptr

Browse Source
This commit is contained in:
Dennis Luxen 2013-10-08 15:26:19 +02:00
parent 843348338a
commit 5afed2d396
1 changed files with 60 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
DataStructures/SharedMemoryFactory.h
View File

@ -67,53 +67,73 @@ class SharedMemory : boost::noncopyable {
};
public:
void * Ptr() const {
return region.get_address();
}
void * Ptr() const {
return region.get_address();
}
template<typename IdentifierT >
SharedMemory(
const boost::filesystem::path & lock_file,
const IdentifierT id,
const unsigned size = 0
) : key(
lock_file.string().c_str(),
id
) {
if( 0 == size ){ //read_only
shm = boost::interprocess::xsi_shared_memory (
boost::interprocess::open_only,
key
);
region = boost::interprocess::mapped_region (
shm,
boost::interprocess::read_only
);
} else { //writeable pointer
//remove previously allocated mem
RemoveSharedMemory(key);
shm = boost::interprocess::xsi_shared_memory (
boost::interprocess::create_only,
key,
size
);
region = boost::interprocess::mapped_region (
shm,
boost::interprocess::read_write
);
template<typename IdentifierT >
SharedMemory(
const boost::filesystem::path & lock_file,
const IdentifierT id,
const unsigned size = 0
) : key(
lock_file.string().c_str(),
id
) {
if( 0 == size ){ //read_only
shm = boost::interprocess::xsi_shared_memory (
boost::interprocess::open_only,
key
);
region = boost::interprocess::mapped_region (
shm,
boost::interprocess::read_only
);
} else { //writeable pointer
//remove previously allocated mem
RemoveSharedMemory(key);
shm = boost::interprocess::xsi_shared_memory (
boost::interprocess::create_only,
key,
size
);
region = boost::interprocess::mapped_region (
shm,
boost::interprocess::read_write
);
remover.SetID( shm.get_shmid() );
SimpleLogger().Write(logDEBUG) <<
"writeable memory allocated " << size << " bytes";
}
}
remover.SetID( shm.get_shmid() );
SimpleLogger().Write(logDEBUG) <<
"writeable memory allocated " << size << " bytes";
}
}
void Swap(SharedMemory & other) {
SimpleLogger().Write() << "prev: " << shm.get_shmid();
shm.swap(other.shm);
region.swap(other.region);
boost::interprocess::xsi_key temp_key = other.key;
other.key = key;
key = temp_key;
SimpleLogger().Write() << "after: " << shm.get_shmid();
}
void Swap(SharedMemory * other) {
SimpleLogger().Write() << "prev: " << shm.get_shmid();
shm.swap(other->shm);
region.swap(other->region);
boost::interprocess::xsi_key temp_key = other->key;
other->key = key;
key = temp_key;
SimpleLogger().Write() << "after: " << shm.get_shmid();
}
template<typename IdentifierT >
static bool RegionExists(
const boost::filesystem::path & lock_file,
const IdentifierT id
) {
boost::interprocess::xsi_key key( lock_file.string().c_str(), id );
OSRMLockFile lock_file;
boost::interprocess::xsi_key key( lock_file().string().c_str(), id );
return RegionExists(key);
}