diff options
| -rw-r--r-- | sys/cam/cam_extend.c | 115 | ||||
| -rw-r--r-- | sys/cam/cam_extend.h | 30 |
2 files changed, 0 insertions, 145 deletions
diff --git a/sys/cam/cam_extend.c b/sys/cam/cam_extend.c deleted file mode 100644 index b6d4133..0000000 --- a/sys/cam/cam_extend.c +++ /dev/null @@ -1,115 +0,0 @@ -/* - * Written by Julian Elischer (julian@tfs.com) - * for TRW Financial Systems for use under the MACH(2.5) operating system. - * - * TRW Financial Systems, in accordance with their agreement with Carnegie - * Mellon University, makes this software available to CMU to distribute - * or use in any manner that they see fit as long as this message is kept with - * the software. For this reason TFS also grants any other persons or - * organisations permission to use or modify this software. - * - * TFS supplies this software to be publicly redistributed - * on the understanding that TFS is not responsible for the correct - * functioning of this software in any circumstances. - * - * $FreeBSD$ - */ -/* - * XXX XXX XXX XXX We should get DEVFS working so that we - * don't have to do this, possibly sparse, array based junk. - * XXX: We can do this now with dev_t, that's even better. - */ -/* - * Extensible arrays: Use a realloc like implementation to permit - * the arrays to be extend. - */ -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/malloc.h> - -#include <cam/cam_extend.h> - -struct extend_array -{ - int nelem; - void **ps; -}; - -static void * -cam_extend_alloc(size_t s) -{ - void *p = malloc(s, M_DEVBUF, M_NOWAIT); - if (!p) - panic("extend_alloc: malloc failed."); - return p; -} - -static void -cam_extend_free(void *p) -{ - free(p, M_DEVBUF); -} - -/* EXTEND_CHUNK: Number of extend slots to allocate whenever we need a new - * one. - */ -#ifndef EXTEND_CHUNK - #define EXTEND_CHUNK 8 -#endif - -struct extend_array * -cam_extend_new(void) -{ - struct extend_array *p = cam_extend_alloc(sizeof(*p)); - if (p) { - p->nelem = 0; - p->ps = 0; - } - - return p; -} - -void * -cam_extend_set(struct extend_array *ea, int index, void *value) -{ - if (index >= ea->nelem) { - void **space; - space = cam_extend_alloc(sizeof(void *) * (index + EXTEND_CHUNK)); - bzero(space, sizeof(void *) * (index + EXTEND_CHUNK)); - - /* Make sure we have something to copy before we copy it */ - if (ea->nelem) { - bcopy(ea->ps, space, sizeof(void *) * ea->nelem); - cam_extend_free(ea->ps); - } - - ea->ps = space; - ea->nelem = index + EXTEND_CHUNK; - } - if (ea->ps[index]) { - printf("extend_set: entry %d already has storage.\n", index); - return 0; - } - else - ea->ps[index] = value; - - return value; -} - -void * -cam_extend_get(struct extend_array *ea, - int index) -{ - if (ea == NULL || index >= ea->nelem || index < 0) - return NULL; - return ea->ps[index]; -} - -void -cam_extend_release(struct extend_array *ea, int index) -{ - void *p = cam_extend_get(ea, index); - if (p) { - ea->ps[index] = 0; - } -} diff --git a/sys/cam/cam_extend.h b/sys/cam/cam_extend.h deleted file mode 100644 index 1ac3835..0000000 --- a/sys/cam/cam_extend.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Written by Julian Elischer (julian@tfs.com) - * for TRW Financial Systems for use under the MACH(2.5) operating system. - * - * TRW Financial Systems, in accordance with their agreement with Carnegie - * Mellon University, makes this software available to CMU to distribute - * or use in any manner that they see fit as long as this message is kept with - * the software. For this reason TFS also grants any other persons or - * organisations permission to use or modify this software. - * - * TFS supplies this software to be publicly redistributed - * on the understanding that TFS is not responsible for the correct - * functioning of this software in any circumstances. - * - * $FreeBSD$ - */ - -#ifndef _CAM_CAM_EXTEND_H -#define _CAM_CAM_EXTEND_H 1 - -#ifdef _KERNEL -struct extend_array; - -void *cam_extend_get(struct extend_array *ea, int index); -struct extend_array *cam_extend_new(void); -void *cam_extend_set(struct extend_array *ea, int index, void *value); -void cam_extend_release(struct extend_array *ea, int index); - -#endif -#endif /* _CAM_CAM_EXTEND_H */ |
