66 строки
2.2 KiB
Plaintext
66 строки
2.2 KiB
Plaintext
/**
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@page libssh_tutor_threads Chapter 8: Threads with libssh
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@section threads_with_libssh How to use libssh with threads
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libssh may be used in multithreaded applications, but under several conditions :
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- Threading must be initialized during the initialization of libssh. This
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initialization must be done outside of any threading context.
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- If pthreads is being used by your application (or your framework's backend),
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you must link with libssh_threads_pthread dynamic library and initialize
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threading with the ssh_threads_pthreads threading object.
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- If an other threading library is being used by your application, you must
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implement all the methods of the ssh_threads_callbacks_struct structure
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and initialize libssh with it.
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- At all times, you may use different sessions inside threads, make parallel
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connections, read/write on different sessions and so on. You can use a
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single session in several channels at the same time. This will lead to
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internal state corruption. This limitation is being worked out and will
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maybe disappear later.
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@subsection threads_init Initialization of threads
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To initialize threading, you must first select the threading model you want to
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use, using ssh_threads_set_callbacks(), then call ssh_init().
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@code
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#include <libssh/callbacks.h>
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...
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ssh_threads_set_callbacks(ssh_threads_noop);
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ssh_init();
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@endcode
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ssh_threads_noop is the threading structure that does nothing. It's the
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threading callbacks being used by default when you're not using threading.
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@subsection threads_pthread Using libpthread with libssh
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If your application is using libpthread, you may simply use the libpthread
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threading backend:
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@code
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#include <libssh/callbacks.h>
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...
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ssh_threads_set_callbacks(ssh_threads_pthread);
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ssh_init();
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@endcode
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However, you must be sure to link with the library ssh_threads_pthread. If
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you're using gcc, you must use the commandline
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@code
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gcc -o output input.c -lssh -lssh_threads_pthread
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@endcode
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@subsection threads_other Using another threading library
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You must find your way in the ssh_threads_callbacks_struct structure. You must
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implement the following methods :
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- mutex_lock
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- mutex_unlock
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- mutex_init
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- mutex_destroy
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- thread_id
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Good luck !
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*/
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