If you publish modified versions somewhere, I'd like to be informed, so we don't end with a lot of versions out of sync.
You may do whatever you want with this document (copy, modify, profit), as long as the attribution is preserved.
I'll fix it when I'll have some extra free time or when the hell will freeze, whatever comes first (probably the latter). ), usually very late at night, so don't expect coherence or good language from it. It has been edited chaotically (oh, it doesn't work like that, edit, edit. This document may contain errors, and strategies different from those suggested may be successful too.
By the way the Colonizopedia contains a few really awful mistakes ( Expert Farmers/Fishermen mod is +2 not +3, minimum population required for some building is wrong etc.). If you're interested in game mechanics, you'll need to crosscheck it with the Colonizopedia. This document also includes a description of major portions of the game mechanics, especially those that aren't described well in Colonizopedia. While I'm not aiming at that level of excellence with this document, I want to provide a good set of tips to enhance your gameplay. Master of Magic has a great one, and FreeCiv wiki is one of the best such documents for any game (FreeCiv is technically not one of the classics, but it's extremely close to Civilization I and II in gameplay). I'm writing this document, because Colonization seems to be the only of the classic strategy games without a good FAQ. Start and the size of the mapped region.Original blog post by Tomasz Wegrzanowski at and copied here with approval - his address was Tomasz.Wegrzanowski"at" The user can specify the offset from the file where the mapped region should , FileSize - FileSize / 2 //Length of the region , FileSize / 2 //Offset from the beginning of shm Mapped_region region ( m_file //Memory-mappable object Using boost :: interprocess std :: size_t FileSize =. Shared memory or from other devices that have also mapping capabilities:
as we have saidīefore The class represents a memory region that has been mapped from a The mapping process is done using the the mapped_region class. System has to synchronize the file contents with the memory contents, memory-mappedĪfter creating a file mapping, a process just has to map the shared memory With the addition of filesystem persistence. We can say that memory-mappedįiles offer the same interprocess communication services as shared memory Writes is seen by another process, so memory mapped files can be used asĪn interprocess communication mechanism. When two processes map the same file in memory, the memory that one process The user just writes data to the process memory,Īnd the operating systems dumps the data to the file. Used also to simplify file usage, so the user does not need to use file-managementįunctions to write the file. Of a file, each process' views contain identical copies of the file onįile mapping is not only used for interprocess communication, it can be If several processes use the same file mapping to create mapped regions Shared memory between two or more applications.Īllows efficient work with a large files, without mapping the whole file Reuse of C++ utilities (STL containers, algorithms) in files. Files and memory can be treated using the sameĪutomatic file data synchronization and cache from the OS. Sure that the shared memory won't be destroyed before the client is launched.
#include #include #include #include int main () Īs we can see, native windows shared memory needs synchronization to make A server process createsĪ shared memory object, maps it and initializes all the bytes to a value.Īfter that, a client process opens the shared memory, maps it, and checks Let's see a simple example of shared memory use. See the boost::interprocess::mapped_region If the offset is specified, but not the size, the mapped regionĬovers from the offset until the end of the mappable object. Size is specified, the whole mappable object (in this case, shared memory) Region should start and the size of the mapped region. The user can specify the offset from the mappable object where the mapped get_address () //Get the size of the region , ShmSize - ShmSize / 2 //Length of the region , ShmSize / 2 //Offset from the beginning of shm Mapped_region region ( shm //Memory-mappable object Using boost :: interprocess std :: size_t ShmSize =. A mapped_region can be created from anyĪnd as you might imagine, shared_memory_object The class representsĪ memory region that has been mapped from a shared memory or from otherĭevices that have also mapping capabilities (for example, files). Once created or opened, a process just has to map the shared memory object