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rminit(9r) [osf1 man page]

rminit(9r)																rminit(9r)

rminit - General: Initializes a resource map SYNOPSIS
void rminit( struct map *map_struct, long size, long addr, char *name, int mapsize ); ARGUMENTS
Specifies a pointer to a map structure to be initialized by a call to rminit. Specifies the size elements used to initialize the resource map. Specifies the address that identifies the start of the free elements. Specifies the name for the resource map. The rminit routine uses this name in warning messages when the map overflows. Specifies the maximum number of fragments. DESCRIPTION
The rminit routine initializes the specified resource map to have mapsize - 2 segments. The routine also identifies this resource map with the string passed to the name argument. It prints this name if the slots become so fragmented that space is lost. The resource map itself is initialized with size elements free, starting at the address specified in addr. NOTES
The caller is responsible for providing any locking necessary for the map structure that the system passes to the rminit routine. RETURN VALUES
Routines: rmalloc(9r), rmfree(9r), rmget(9r) rminit(9r)

Check Out this Related Man Page

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

rmallocmap, rmallocmap_wait, rmfreemap - allocate and free resource maps SYNOPSIS
#include <sys/ddi.h> #include <sys/sunddi.h> struct map *rmallocmap(size_t mapsize); struct map *rmallocmap_wait(size_t mapsize); void rmfreemap(struct map *mp); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
mapsize Number of entries for the map. mp A pointer to the map structure to be deallocated. DESCRIPTION
rmallocmap() dynamically allocates a resource map structure. The argument mapsize defines the total number of entries in the map. In par- ticular, it is the total number of allocations that can be outstanding at any one time. rmallocmap() initializes the map but does not associate it with the actual resource. In order to associate the map with the actual resource, a call to rmfree(9F) is used to make the entirety of the actual resource available for allocation, starting from the first index into the resource. Typically, the call to rmallocmap() is followed by a call to rmfree(9F), passing the address of the map returned from rmallocmap(), the total size of the resource, and the first index into the actual resource. The resource map allocated by rmallocmap() can be used to describe an arbitrary resource in whatever allocation units are appropriate, such as blocks, pages, or data structures. This resource can then be managed by the system by subsequent calls to rmalloc(9F), rmal- loc_wait(9F), and rmfree(9F). rmallocmap_wait() is similar to rmallocmap(), with the exception that it will wait for space to become available if necessary. rmfreemap() deallocates a resource map structure previously allocated by rmallocmap() or rmallocmap_wait(). The argument mp is a pointer to the map structure to be deallocated. RETURN VALUES
Upon successful completion, rmallocmap() and rmallocmap_wait() return a pointer to the newly allocated map structure. Upon failure, rmal- locmap() returns a NULL pointer. CONTEXT
rmallocmap() and rmfreemap() can be called from user, kernel, or interrupt context. rmallocmap_wait() can only be called from user or kernel context. SEE ALSO
rmalloc(9F), rmalloc_wait(9F), rmfree(9F) Writing Device Drivers SunOS 5.11 20 Nov 1996 rmallocmap(9F)
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