IDR_ALLOC_CYCLIC(9) Basic Kernel Library Functions IDR_ALLOC_CYCLIC(9)NAME
idr_alloc_cyclic - allocate new idr entry in a cyclical fashion
int idr_alloc_cyclic(struct idr * idr, void * ptr, int start, int end, gfp_t gfp_mask);
the (initialized) idr
pointer to be associated with the new id
the minimum id (inclusive)
the maximum id (exclusive, <= 0 for max)
memory allocation flags
Essentially the same as idr_alloc, but prefers to allocate progressively higher ids if it can. If the "cur" counter wraps, then it will
start again at the "start" end of the range and allocate one that has already been used.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 IDR_ALLOC_CYCLIC(9)
Check Out this Related Man Page
Tcl_Alloc(3) Tcl Library Procedures Tcl_Alloc(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_Alloc, Tcl_Free, Tcl_Realloc, Tcl_AttemptAlloc, Tcl_AttemptRealloc, ckalloc, ckfree, ckrealloc, attemptckalloc, attemptckrealloc -
allocate or free heap memory
int size (in) Size in bytes of the memory block to allocate.
char *ptr (in) Pointer to memory block to free or realloc.
These procedures provide a platform and compiler independent interface for memory allocation. Programs that need to transfer ownership of
memory blocks between Tcl and other modules should use these routines rather than the native malloc() and free() routines provided by the C
Tcl_Alloc returns a pointer to a block of at least size bytes suitably aligned for any use.
Tcl_Free makes the space referred to by ptr available for further allocation.
Tcl_Realloc changes the size of the block pointed to by ptr to size bytes and returns a pointer to the new block. The contents will be
unchanged up to the lesser of the new and old sizes. The returned location may be different from ptr.
Tcl_AttemptAlloc and Tcl_AttemptRealloc are identical in function to Tcl_Alloc and Tcl_Realloc, except that Tcl_AttemptAlloc and
Tcl_AttemptRealloc will not cause the Tcl interpreter to panic if the memory allocation fails. If the allocation fails, these functions
will return NULL. Note that on some platforms, attempting to allocate a block of memory will also cause these functions to return NULL.
The procedures ckalloc, ckfree, ckrealloc, attemptckalloc, and attemptckrealloc are implemented as macros. Normally, they are synonyms for
the corresponding procedures documented on this page. When Tcl and all modules calling Tcl are compiled with TCL_MEM_DEBUG defined, how-
ever, these macros are redefined to be special debugging versions of of these procedures. To support Tcl's memory debugging within a mod-
ule, use the macros rather than direct calls to Tcl_Alloc, etc.
alloc, allocation, free, malloc, memory, realloc, TCL_MEM_DEBUG
Tcl 7.5 Tcl_Alloc(3)
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