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rmalloc_wait(9f) [opensolaris man page]

rmalloc_wait(9F)					   Kernel Functions for Drivers 					  rmalloc_wait(9F)

NAME
rmalloc_wait - allocate space from a resource map, wait if necessary SYNOPSIS
#include <sys/map.h> #include <sys/ddi.h> unsigned long rmalloc_wait(struct map *mp, size_t size); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
mp Pointer to the resource map from which space is to be allocated. size Number of units of space to allocate. DESCRIPTION
The rmalloc_wait() function requests an allocation of space from a resource map. rmalloc_wait() is similar to the rmalloc(9F) function with the exception that it will wait for space to become available if necessary. RETURN VALUES
The rmalloc_wait() function returns the base of the allocated space. CONTEXT
This function can be called from user, interrupt, or kernel context. However, in most cases rmalloc_wait() should not be called from inter- rupt context. SEE ALSO
rmalloc(9F), rmallocmap(9F), rmfree(9F), rmfreemap(9F) Writing Device Drivers SunOS 5.11 16 Jan 2006 rmalloc_wait(9F)

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rmfree(9F)						   Kernel Functions for Drivers 						rmfree(9F)

NAME
rmfree - free space back into a resource map SYNOPSIS
#include <sys/map.h> #include <sys/ddi.h> void rmfree(struct map *mp, size_t size, ulong_t index); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
mp Pointer to the map structure. size Number of units being freed. index Index of the first unit of the allocated resource. DESCRIPTION
The rmfree() function releases space back into a resource map. It is the opposite of rmalloc(9F), which allocates space that is controlled by a resource map structure. When releasing resources using rmfree() the size and index passed to rmfree() must exactly match the size and index values passed to and returned from a previous call to rmalloc(). Resources cannot be returned piecemeal. Drivers may define resource maps for resource allocation, in terms of arbitrary units, using the rmallocmap(9F) function. The system main- tains the resource map structure by size and index, computed in units appropriate for the resource. For example, units may be byte addresses, pages of memory, or blocks. rmfree() frees up unallocated space for re-use. The rmfree() function can also be used to initialize a resource map, in which case the size and index should cover the entire resource area. CONTEXT
The rmfree() function can be called from user, interrupt, or kernel context. SEE ALSO
rmalloc(9F), rmalloc_wait(9F), rmallocmap(9F), rmfreemap(9F) Writing Device Drivers SunOS 5.11 16 Jan 2006 rmfree(9F)
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