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| Kernel Functions for Drivers | esbbcall(9F) |
| | esbbcall - call function when buffer is available |
SYNOPSIS
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#include <sys/stream.h>
bufcall_id_t esbbcall(uint_t pri, void (*func)(void *arg), void (arg)); |
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Architecture independent level 1 (DDI/DKI).
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pri
- Priority of allocation request (to be used by allocb(9F) function, called by esbbcall())
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func
- Function to be called when buffer becomes available.
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arg
- Argument to func.
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esbbcall(), 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. func may be a routine that calls esballoc(9F) or it may be another kernel function.
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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).
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esbbcall() can be called from user or interrupt context.
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