f3f017a87d
Now that we have 3 mutexes lying around, it's important that we check and free these if necessary if error() is called in any thread that can hold them. To do this, we now have flexthread.c, which defines a flexthread_mutex struct. This is a wrapper around a pthread_mutex_t and a pthread_t. The idea is that in the error handler, the thread can check whether it holds the mutex and can free it if and only if it does. This is important because pthread fast mutexes can be freed by *any* thread, not just the thread which holds them. Note: it is only ever safe for a thread to check if it holds the mutex itself. It is *never* safe to check if another thread holds a mutex without first locking that mutex, which makes the whole operation rather pointless.
29 lines
648 B
Ruby
Executable File
29 lines
648 B
Ruby
Executable File
#!/usr/bin/env ruby
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# encoding: utf-8
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# Open a server, accept a client, then we expect a single write
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# followed by an entrust. Disconnect after the entrust. We expect a
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# reconnection followed by a full mirror.
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require 'flexnbd/fake_dest'
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include FlexNBD
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addr, port, src_pid = *ARGV
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server = FakeDest.new( addr, port )
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client = server.accept
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client.write_hello
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write_req = client.read_request
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data = client.read_data( write_req[:len] )
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client.write_reply( write_req[:handle], 0 )
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entrust_req = client.read_request
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fail "Not an entrust" unless entrust_req[:type] == 65536
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client.close
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client2 = server.accept
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client2.receive_mirror
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exit(0)
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