SharedMemory * MemoryServer::insertShared(ProcessID procID,
char *key, Size size,
MemoryRange *range, bool *created)
{
SharedMemory *obj = findShared(key);
bool needCreate = obj == ZERO;
if (needCreate)
obj = new SharedMemory;
range->virtualAddress = findFreeRange(procID, size);
range->bytes = size;
range->access = Memory::Present | Memory::User | Memory::Readable | Memory::Writable | Memory::Pinned;
/* Only create a new mapping, if non-existent. */
if (needCreate)
{
range->physicalAddress = ZERO;
VMCtl(procID, Map, range);
/* Create new shared memory object. */
obj->size = size;
obj->key = key;
obj->address = range->physicalAddress;
/* Insert to the list. */
shared.append(obj);
/* We created a new mapping, flag that. */
if (created) *created = true;
}
else
{
range->physicalAddress = obj->address;
VMCtl(procID, Map, range);
/* We didn't create a new mapping, flag that. */
if (created) *created = false;
}
/* Done. */
return obj;
}
SharedMemory * MemoryServer::insertShared(ProcessID procID,
char *key, Size size,
MemoryRange *range, bool *created)
{
SharedMemory *obj;
range->virtualAddress = findFreeRange(procID, size);
range->bytes = size;
range->protection = PAGE_PRESENT | PAGE_USER | PAGE_RW | PAGE_PINNED;
/* Only create a new mapping, if non-existent. */
if (!(obj = findShared(key)))
{
range->physicalAddress = ZERO;
VMCtl(procID, Map, range);
/* Create new shared memory object. */
obj = new SharedMemory;
obj->size = size;
obj->key = new String(key);
obj->address = range->physicalAddress;
/* Insert to the list. */
shared.insertTail(obj);
/* We created a new mapping, flag that. */
if (created) *created = true;
}
else
{
range->physicalAddress = obj->address;
VMCtl(procID, Map, range);
/* We didn't create a new mapping, flag that. */
if (created) *created = false;
}
/* Done. */
return obj;
}
