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man pages section 9: DDI and DKI Kernel Functions

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Updated: July 2017



esbbcall - call function when buffer is available


#include <sys/stream.h> 

bufcall_id_t esbbcall(uint_t 
pri, void (*func)(
void *arg), 

Interface Level

Architecture independent level 1 (DDI/DKI).



Priority of allocation request (to be used by allocb(9F) function, called by esbbcall ()).


Function to be called when buffer becomes available.


Argument to func.


The esbbcall() function, like bufcall(9F), serves as a timeout(9F) call of indeterminate length. If esballoc(9F) is unable to allocate a message and data block header to go with its externally supplied data buffer, esbbcall() can be used to schedule the routine func, to be called with the argument arg when a buffer becomes available. The func argument can be a routine that calls esballoc(9F) or it may be another kernel function.

Return Values

On success, a bufcall IDis returned. On failure, 0 is returned. The value returned from a successful call should be saved for possible future use with unbufcall () should it become necessary to cancel the esbbcall() request (as at driver close time).


The esbbcall() function can be called from user, interrupt, or kernel context.

See Also

allocb(9F), bufcall(9F), esballoc(9F), timeout(9F), datab(9S), unbufcall(9F)

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