One Word: Boost.InterProcess. If it really needs to be fast, shared memory is the way to go. You nearly have zero overhead as the operation system does the usual mapping between virtual and physical addresses and no copy is required for the data. You just have to lookout for concurrency issues. For actually sending commands … Read more
As you’re on a shared Linux box, you’ll have to ask the system administrator to do the following, probably. Create a startup script in /etc/init.d/solr. Copy this code, my Solr startup script, into that file: #!/bin/sh # Prerequisites: # 1. Solr needs to be installed at /usr/local/solr/example # 2. daemon needs to be installed # … Read more
Sadly there is no direct analogue to RPATH. There are a number of alternative possibilities, each of them most likely undesirable to you in its own special way. Given that you need a different exe for each build flavor anyway to avoid runtime library clashes, as you might guess the easiest thing to do is … Read more
After some (a lot of) digging throughout the web, I found the answer. The access Group that you use when constructing your KeychainItemWrapper class must ALSO be specified in each of your application’s Entitlements.plist file in the “keychain-access-groups” section. It seems almost obvious now that I see “keychain-access-groups“. However, I had no idea to even … Read more
You have two options to retrieve a reference to the object pointed to by a shared_ptr. Suppose you have a shared_ptr variable named ptr. You can get the reference either by using *ptr or *ptr.get(). These two should be equivalent, but the first would be preferred. The reason for this is that you’re really attempting … Read more
Try this to make an existing repository in repodir work for users in group foo: chgrp -R foo repodir # set the group chmod -R g+rw repodir # allow the group to read/write chmod g+s `find repodir -type d` # new files get group id of directory git init –bare –shared=all repodir # sets some … Read more
To add to @unutbu’s (not available anymore) and @Henry Gomersall’s answers. You could use shared_arr.get_lock() to synchronize access when needed: shared_arr = mp.Array(ctypes.c_double, N) # … def f(i): # could be anything numpy accepts as an index such another numpy array with shared_arr.get_lock(): # synchronize access arr = np.frombuffer(shared_arr.get_obj()) # no data copying arr[i] = … Read more
Yes, it’s moderately easy. Just use two “add_library” commands: add_library(MyLib SHARED source1.c source2.c) add_library(MyLibStatic STATIC source1.c source2.c) Even if you have many source files, you can place the list of sources in a Cmake variable, so it’s still easy to do. On Windows you should probably give each library a different name, since there is … Read more