author | Tero Marttila <terom@fixme.fi> |
Thu, 05 Jun 2008 22:53:47 +0300 | |
changeset 6 | 4252c27f2b72 |
parent 5 | d4263f1f5b55 |
child 7 | 446c0b816b91 |
permissions | -rw-r--r-- |
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#ifndef RENDER_REMOTE_H |
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#define RENDER_REMOTE_H |
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#include <event2/util.h> |
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#include <event2/buffer.h> |
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#include "render.h" |
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/* |
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* Execute a render_t operation on a remote render_node |
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*/ |
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#define RENDER_PORT 6159 |
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struct remote_render_ctx; |
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/* |
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* Execute the given render operation on the render_node at the given remote address. |
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* |
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* The various callback functions must all be provided. |
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* |
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* cb_sent will be invoked after the request has succesfully been written, and before cb_data is called. |
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* cb_data is called whenever new data has been received. See also, render_remote_set_chunk_size |
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* cb_done is called when all the data has been passed to cb_data |
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* cb_fail is called when an error is encountered. This can (and will) happen at any time! |
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*/ |
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struct remote_render_ctx *render_remote ( |
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render_t *render_ctx, // what to render |
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struct sockaddr_storage *remote, // what render node to use |
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void (*cb_sent)(void *arg), |
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void (*cb_data)(struct evbuffer *buf, void *arg), |
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void (*cb_done)(void *arg), |
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void (*cb_fail)(void *arg), |
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void *cb_arg; |
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); |
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/* |
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* Cancel the given request. No more callbacks will be called, buffered data is discarded and the remote render process will cancel asap. |
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*/ |
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void render_remote_cancel (struct remote_render_ctx *ctx); |
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/* |
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* Controls the behaviour of when cb_data is called, and how remote data is read in. |
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* |
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* recv_threshold, sets a threshold for calling cb_data - cb_data will only be called |
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* if the buffer contains at least recv_threshold, bytes. Note that cb_data is only |
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* ever called when new data has been receieved from the remote end - never |
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* otherwise. If cb_data doesn't drain the buffer, cb_data will be called again |
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* once more data has been received from the remote end. |
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* |
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* overflow_size can be used to control the amount of unread data in cb_data. If |
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* the buffer contains more than recv_threshold + unread_buffer bytes, we will stop |
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* accepting bytes from the remote end, and cb_data will not be called any more. |
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* |
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* Only call this once cb_sent has fired |
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*/ |
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int render_remote_set_recv (struct remote_render_ctx *ctx, size_t recv_threshold, size_t unread_buffer); |
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/* |
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* Call cb_data with the current set of buffered input data immediately, |
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* regardless of whether or not the buffer contains any data, or any new |
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* data has been received. |
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* |
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* Only call this after cb_sent and before cb_done/cb_fail. |
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*/ |
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int render_remote_shake (struct remote_render_ctx *ctx); |
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#endif /* RENDER_REMOTE_H */ |