4f31bd9340
This commit beefs up the Makefile to do the build, instead of the Rakefile. It also removes from the Rakefile the dependency on rake_utils, which should mean it's ok to build in a schroot. The files are reorganised to make the Makefile rules more tractable, although the reorganisation reveals a problem with our current code organisation. The problem is that the proxy-specific code transitively depends on the server code via flexnbd.h, which has a circular dependency on the server and client structs. This should be broken in a future commit by separating the flexnbd struct into a shared config struct and server-specific parts, so that the server code can be moved into src/server to more accurately show the functional dependencies.
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
#ifndef MBOX_H
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#define MBOX_H
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/** mbox
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* A thread sync object. Put a void * into the mbox in one thread, and
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* get it out in another. The receiving thread will block if there's
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* nothing in the mbox, and the sending thread will block if there is.
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* The mbox doesn't assume any responsibility for the pointer it's
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* passed - you must free it yourself if it's malloced.
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*/
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#include <pthread.h>
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struct mbox {
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void * contents;
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/** Marker to tell us if there's content in the box.
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* Keeping this separate allows us to use NULL for the contents.
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*/
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int full;
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/** This gets signaled by mbox_post, and waited on by
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* mbox_receive */
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pthread_cond_t filled_cond;
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/** This is signaled by mbox_receive, and waited on by mbox_post */
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pthread_cond_t emptied_cond;
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pthread_mutex_t mutex;
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};
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/* Create an mbox. */
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struct mbox * mbox_create(void);
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/* Put something in the mbox, blocking if it's already full.
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* That something can be NULL if you want.
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*/
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void mbox_post( struct mbox *, void *);
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/* See what's in the mbox. This isn't thread-safe. */
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void * mbox_contents( struct mbox *);
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/* See if anything has been put into the mbox. This isn't thread-safe.
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* */
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int mbox_is_full( struct mbox *);
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/* Get the contents from the mbox, blocking if there's nothing there. */
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void * mbox_receive( struct mbox *);
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/* Free the mbox and destroy the associated pthread bits. */
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void mbox_destroy( struct mbox *);
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#endif
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