/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#ifndef _KERN_AST_H_
#define _KERN_AST_H_
-#include <cpus.h>
#include <platforms.h>
#include <kern/assert.h>
-#include <kern/cpu_number.h>
#include <kern/macro_help.h>
#include <kern/lock.h>
#include <kern/spl.h>
#define AST_SCHEDULING (AST_PREEMPTION | AST_YIELD | AST_HANDOFF)
#define AST_PREEMPTION (AST_PREEMPT | AST_QUANTUM | AST_URGENT)
-extern volatile ast_t need_ast[NCPUS];
-
#ifdef MACHINE_AST
/*
* machine/ast.h is responsible for defining aston and astoff.
extern void ast_check(
processor_t processor);
+/* Pending ast mask for the current processor */
+extern ast_t *ast_pending(void);
+
/*
* Per-thread ASTs are reset at context-switch time.
*/
#define AST_PER_THREAD (AST_APC | AST_BSD | MACHINE_AST_PER_THREAD)
/*
- * ast_needed(), ast_on(), ast_off(), ast_context(), and ast_propagate()
+ * ast_pending(), ast_on(), ast_off(), ast_context(), and ast_propagate()
* assume splsched.
*/
-#define ast_needed(mycpu) (need_ast[mycpu] != AST_NONE)
-#define ast_on_fast(reasons) \
-MACRO_BEGIN \
- int mycpu = cpu_number(); \
- if ((need_ast[mycpu] |= (reasons)) != AST_NONE) \
- { aston(mycpu); } \
+#define ast_on_fast(reasons) \
+MACRO_BEGIN \
+ ast_t *myast = ast_pending(); \
+ \
+ if ((*myast |= (reasons)) != AST_NONE) \
+ { aston(myast); } \
MACRO_END
-#define ast_off_fast(reasons) \
-MACRO_BEGIN \
- int mycpu = cpu_number(); \
- if ((need_ast[mycpu] &= ~(reasons)) == AST_NONE) \
- { astoff(mycpu); } \
+#define ast_off_fast(reasons) \
+MACRO_BEGIN \
+ ast_t *myast = ast_pending(); \
+ \
+ if ((*myast &= ~(reasons)) == AST_NONE) \
+ { astoff(myast); } \
MACRO_END
#define ast_propagate(reasons) ast_on(reasons)
-#define ast_context(act, mycpu) \
-MACRO_BEGIN \
- assert((mycpu) == cpu_number()); \
- if ((need_ast[mycpu] = \
- ((need_ast[mycpu] &~ AST_PER_THREAD) | (act)->ast)) != AST_NONE) \
- { aston(mycpu); } \
- else \
- { astoff(mycpu); } \
+#define ast_context(act) \
+MACRO_BEGIN \
+ ast_t *myast = ast_pending(); \
+ \
+ if ((*myast = ((*myast &~ AST_PER_THREAD) | (act)->ast)) != AST_NONE) \
+ { aston(myast); } \
+ else \
+ { astoff(myast); } \
MACRO_END
#define ast_on(reason) ast_on_fast(reason)
#define ast_off(reason) ast_off_fast(reason)
+/*
+ * NOTE: if thread is the current thread, thread_ast_set() should
+ * be followed by ast_propagate().
+ */
#define thread_ast_set(act, reason) \
(hw_atomic_or(&(act)->ast, (reason)))
#define thread_ast_clear(act, reason) \
#define thread_ast_clear_all(act) \
(hw_atomic_and(&(act)->ast, AST_NONE))
-/*
- * NOTE: if thread is the current thread, thread_ast_set() should
- * be followed by ast_propagate().
- */
+#ifdef MACH_BSD
+
+extern void astbsd_on(void);
+extern void act_set_astbsd(thread_t);
+extern void bsd_ast(thread_t);
+
+#endif /* MACH_BSD */
#endif /* _KERN_AST_H_ */
projects / apple / xnu.git / blobdiff