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Annotation of kernel/machdep/i386/pc_support/PCmiscInline.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * Copyright (c) 1993 NeXT Computer, Inc.
        !            27:  *
        !            28:  * Miscellaneous inline functions.
        !            29:  *
        !            30:  * HISTORY
        !            31:  *
        !            32:  * 15 Mar 1993 ? at NeXT
        !            33:  *     Created.
        !            34:  */
        !            35: 
        !            36: #if    KERNEL_PRIVATE
        !            37: 
        !            38: #import <mach/mach_types.h>
        !            39: 
        !            40: #import "PCprivate.h"
        !            41: 
        !            42: static __inline__
        !            43: boolean_t
        !            44: maskIsSet(
        !            45:     void *             mask,
        !            46:     int                        n
        !            47: )
        !            48: {
        !            49: #define cmask          ((unsigned char *)mask)
        !            50: 
        !            51:     if (n < (sizeof (unsigned int) * BYTE_SIZE))
        !            52:        return ((*(unsigned int *)cmask & (1 << n)) != 0);
        !            53:        
        !            54:     return ((*(cmask + (n / BYTE_SIZE)) & (1 << (n % BYTE_SIZE))) != 0);
        !            55: #undef cmask
        !            56: }
        !            57: 
        !            58: static __inline__
        !            59: PCcontext_t
        !            60: currentContext(
        !            61:     PCshared_t         shared
        !            62: )
        !            63: {    
        !            64:     if (shared->currentContext >= 0 &&
        !            65:            shared->currentContext < PCMAXCONTEXT)
        !            66:        return (&shared->contexts[shared->currentContext]);
        !            67:     else
        !            68:        return ((PCcontext_t) 0);
        !            69: }
        !            70: 
        !            71: static __inline__
        !            72: PCshared_t
        !            73: threadPCShared(
        !            74:     thread_t           thread
        !            75: )
        !            76: {
        !            77:     if (thread->pcb->PCpriv)
        !            78:        return ((PCshared_t)thread->pcb->PCpriv->shared);
        !            79:     else
        !            80:        return ((PCshared_t) 0);
        !            81: }
        !            82: 
        !            83: static __inline__
        !            84: PCcontext_t
        !            85: threadPCContext(
        !            86:     thread_t           thread
        !            87: )
        !            88: {
        !            89:     PCshared_t         shared = threadPCShared(thread);
        !            90: 
        !            91:     if (shared)
        !            92:        return (currentContext(shared));
        !            93:     else
        !            94:        return ((PCcontext_t) 0);
        !            95: }
        !            96: 
        !            97: static __inline__
        !            98: boolean_t
        !            99: threadPCException(
        !           100:     thread_t                   thread,
        !           101:     thread_saved_state_t       *state
        !           102: )
        !           103: {
        !           104:     PCshared_t         shared = threadPCShared(thread);
        !           105:     
        !           106:     if (shared && !maskIsSet(&shared->machMask, state->trapno))
        !           107:        return (PCexception(thread, state));
        !           108:     else
        !           109:        return (FALSE);
        !           110: }
        !           111: 
        !           112: static __inline__
        !           113: void
        !           114: threadPCInterrupt(
        !           115:     thread_t                   thread,
        !           116:     thread_saved_state_t       *state
        !           117: )
        !           118: {
        !           119:     PCcontext_t                context = threadPCContext(thread);
        !           120:     
        !           121:     if (context &&
        !           122:        (context->pendingTimers || context->pendingCallbacks) &&
        !           123:                                                        context->running) {
        !           124:        PCcallMonitor(thread, state);
        !           125:        /* NOTREACHED */
        !           126:     }
        !           127: }
        !           128: 
        !           129: #endif

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