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add ability to _not_ destroy prev allocated memory

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This commit is contained in:
Dennis Luxen 2013-10-25 14:00:34 +02:00
parent 86433ab3a8
commit 3e63b14192
1 changed files with 43 additions and 20 deletions
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63
DataStructures/SharedMemoryFactory.h
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@ -82,7 +82,9 @@ public:
SharedMemory(
const boost::filesystem::path & lock_file,
const IdentifierT id,
const unsigned size = 0
const unsigned size = 0,
bool read_write = false,
bool remove_prev = true
) : key(
lock_file.string().c_str(),
id
@ -94,13 +96,19 @@ public:
);
region = boost::interprocess::mapped_region (
shm,
boost::interprocess::read_only
(
read_write ?
boost::interprocess::read_write :
boost::interprocess::read_only
)
);
} else { //writeable pointer
//remove previously allocated mem
RemoveSharedMemory(key);
if( remove_prev ) {
Remove(key);
}
shm = boost::interprocess::xsi_shared_memory (
boost::interprocess::create_only,
boost::interprocess::open_or_create,
key,
size
);
@ -115,24 +123,28 @@ public:
}
}
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();
// }
void Swap(SharedMemory * other) {
SimpleLogger().Write() << "prev: " << shm.get_shmid();
SimpleLogger().Write() << "this key: " << key.get_key() << ", other: " << other->key.get_key();
SimpleLogger().Write() << "this id: " << shm.get_shmid() << ", other: " << other->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();
SimpleLogger().Write() << "swap done";
SimpleLogger().Write() << "this key: " << key.get_key() << ", other: " << other->key.get_key();
SimpleLogger().Write() << "this id: " << shm.get_shmid() << ", other: " << other->shm.get_shmid();
}
template<typename IdentifierT >
@ -151,12 +163,12 @@ public:
}
template<typename IdentifierT >
static void RemoveSharedMemory(
static void Remove(
const IdentifierT id
) {
OSRMLockFile lock_file;
boost::interprocess::xsi_key key( lock_file().string().c_str(), id );
RemoveSharedMemory(key);
Remove(key);
}
private:
@ -173,7 +185,7 @@ private:
return result;
}
static void RemoveSharedMemory(
static void Remove(
const boost::interprocess::xsi_key &key
) {
try{
@ -199,10 +211,21 @@ private:
template<class LockFileT = OSRMLockFile>
class SharedMemoryFactory_tmpl : boost::noncopyable {
public:
template<typename IdentifierT >
static void Swap(const IdentifierT & id1, const IdentifierT & id2) {
SharedMemory * memory_1 = Get(id1);
SharedMemory * memory_2 = Get(id2);
memory_1->Swap(memory_2);
}
template<typename IdentifierT >
static SharedMemory * Get(
const IdentifierT & id,
const unsigned size = 0
const unsigned size = 0,
bool read_write = false,
bool remove_prev = true
) {
try {
LockFileT lock_file;
@ -214,7 +237,7 @@ public:
ofs.close();
}
}
return new SharedMemory(lock_file(), id, size);
return new SharedMemory(lock_file(), id, size, read_write, remove_prev);
} catch(const boost::interprocess::interprocess_exception &e){
SimpleLogger().Write(logWARNING) <<
"caught exception: " << e.what() <<