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Cleaned up kernel.h; the insque(), remque() functions are now in a separate 

header kqueue.h - together with their implementation which was in module.c
Added a new CHECK_USER_ADDRESS() macro that can be used to check if a
user address points into the kernel.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1742 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2002-10-29 03:31:57 +00:00
parent 03360f3bb7
commit 8f3a4e7dd4
2 changed files with 59 additions and 43 deletions
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57
headers/private/kernel/kernel.h
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@ -5,59 +5,30 @@
#ifndef _KERNEL_KERNEL_H
#define _KERNEL_KERNEL_H
/**
* @file kernel/kernel.h
* @brief Kernel Definitions
*/
/**
* @defgroup OpenBeOS_Kernel OpenBeOS Kernel
* @brief The OpenBeOS Kernel
* @{
*/
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* david - same fiddle as stage2.h. Renamed the arch specific
* kernel.h file into arch_kernel.h and then just include
* it here as the arch specific directories are included on the
* include paths for the build.
*/
#include <arch_kernel.h>
/**
* Size of the kernel stack
*/
#define KSTACK_SIZE (PAGE_SIZE*2)
/**
* Size of the stack given to processes
*/
#define STACK_SIZE (PAGE_SIZE*16)
/**
* Size of the environmental variables space for a process
*/
#define ENV_SIZE (PAGE_SIZE*8)
/* Passed in buffers from user-space shouldn't point into the kernel */
#define CHECK_USER_ADDRESS(x) \
((addr)(x) < KERNEL_BASE || (addr)(x) > KERNEL_TOP)
/** Size of the kernel stack */
#define KSTACK_SIZE (PAGE_SIZE * 2)
/** Size of the stack given to teams in user space */
#define STACK_SIZE (PAGE_SIZE * 16)
/** Size of the environmental variables space for a process */
#define ENV_SIZE (PAGE_SIZE * 8)
#define ROUNDUP(a, b) (((a) + ((b)-1)) & ~((b)-1))
#define ROUNDOWN(a, b) (((a) / (b)) * (b))
/** Is bit 'b' set in 'a' */
#define CHECK_BIT(a, b) ((a) & (1 << (b)))
/** Set bit 'b' in 'a' */
#define SET_BIT(a, b) ((a) | (1 << (b)))
/** Unset bit 'b' in 'a' */
#define CLEAR_BIT(a, b) ((a) & (~(1 << (b))))
__inline void insque(void *, void*);
__inline void remque(void *);
#ifdef __cplusplus
}
#endif
/** @} */
#endif /* _KERNEL_KERNEL_H */
#endif /* _KERNEL_KERNEL_H */

45
headers/private/kernel/kqueue.h Normal file
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@ -0,0 +1,45 @@
/*
** Copyright 2002, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
** Distributed under the terms of the OpenBeOS License.
*/
#ifndef KQUEUE_H
#define KQUEUE_H
/* The object that is put into a queue must begin with these
* fields, but it doesn't have to be this structure.
*/
struct quehead {
struct quehead *next;
struct quehead *prev;
};
/** Inserts an element (a) to the queue (b) */
static inline void
insque(void *a, void *b)
{
struct quehead *element = (struct quehead *)a,
*head = (struct quehead *)b;
element->next = head->next;
element->prev = head;
head->next = element;
element->next->prev = element;
}
/** removes an element from the queue it's currently in */
static inline void
remque(void *a)
{
struct quehead *element = (struct quehead *)a;
element->next->prev = element->prev;
element->prev->next = element->next;
element->prev = 0;
}
#endif /* KQUEUE_H */