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annotate src/login-common/login-proxy.h @ 4906:0c3c948412c5 HEAD

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Type safe callbacks weren't as easy as I thought. Only callback(void *context) can be handled generically. Others can be handled specially, but only if all the parameters are pointers, otherwise eg. int parameter can be replaced with long without compiler giving any warnings.
author Timo Sirainen <tss@iki.fi>
date Fri, 15 Dec 2006 20:10:51 +0200
parents 204d7edc7cdc
children 5c0a5cf4626d
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1 #ifndef __LOGIN_PROXY_H
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2 #define __LOGIN_PROXY_H
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3
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4 struct login_proxy;
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5
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6 /* Called when new input comes from proxy. */
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7 typedef void proxy_callback_t(struct istream *input, struct ostream *output,
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8 void *context);
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9
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10 /* Create a proxy to given host. Returns NULL if failed. Given callback is
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11 called when new input is available from proxy. */
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12 struct login_proxy *
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13 login_proxy_new(struct client *client, const char *host, unsigned int port,
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14 proxy_callback_t *callback, void *context);
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15 #ifdef CONTEXT_TYPE_SAFETY
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16 # define login_proxy_new(client, host, port, callback, context) \
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17 ({(void)(1 ? 0 : callback((struct istream *)NULL, \
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18 (struct ostream *)NULL, context)); \
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19 login_proxy_new(client, host, port, \
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20 (proxy_callback_t *)callback, context); })
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21 #else
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22 # define login_proxy_new(client, host, port, callback, context) \
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23 login_proxy_new(client, host, port, \
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24 (proxy_callback_t *)callback, context)
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25 #endif
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26 /* Free the proxy. This should be called if authentication fails. */
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27 void login_proxy_free(struct login_proxy *proxy);
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28
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29 /* Detach proxy from client. This is done after the authentication is
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30 successful and all that is left is the dummy proxying. */
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31 void login_proxy_detach(struct login_proxy *proxy, struct istream *client_input,
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32 struct ostream *client_output);
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33
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34 /* Return number of active detached login proxies */
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35 unsigned int login_proxy_get_count(void);
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36
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37 void login_proxy_deinit(void);
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38
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39 #endif