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NetBSD 6.1.5 - man page for puffs_cc (netbsd section 3)

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PUFFS_CC(3)			   BSD Library Functions Manual 		      PUFFS_CC(3)

NAME
     puffs_cc -- puffs continuation routines

LIBRARY
     library ``libpuffs''

SYNOPSIS
     #include <puffs.h>

     void
     puffs_cc_yield(struct puffs_cc *pcc);

     void
     puffs_cc_continue(struct puffs_cc *pcc);

     void
     puffs_cc_schedule(struct puffs_cc *pcc);

     struct puffs_cc *
     puffs_cc_getcc(struct puffs_usermount *pu);

DESCRIPTION
     These routines are used for the cooperative multitasking suite present in puffs.

     puffs_cc_yield(pcc)
	   Suspend and save the current execution context and return control to the previous
	   point.  In practice, from the file system author perspective, control returns back to
	   where either the mainloop or where puffs_dispatch_exec() was called from.

     puffs_cc_continue(pcc)
	   Will suspend current execution and return control to where it was before before call-
	   ing puffs_cc_yield().  This is rarely called directly but rather through
	   puffs_dispatch_exec().

     puffs_cc_schedule(pcc)
	   Schedule a continuation.  As opposed to puffs_cc_continue() this call returns immedi-
	   ately.  pcc will be scheduled sometime in the future.

     puffs_cc_getcc(pu)
	   Returns the current pcc or NULL if this is the main thread.	NOTE: The argument pu
	   will most likely disappear at some point.

     Before calling puffs_cc_yield() a file system will typically want to record some cookie
     value into its own internal bookkeeping.  This cookie should be hooked to the pcc so that
     the correct continuation can be continued when the event it was waiting for triggers.
     Alternatively, the puffs_framebuf(3) framework and puffs_mainloop() can be used for handling
     this automatically.

SEE ALSO
     puffs(3), puffs_framebuf(3)

BSD					 January 28, 2008				      BSD
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