1    /* 
     2     *  Copyright (c) 2008 Texas Instruments. All rights reserved.
     3     *  This program and the accompanying materials are made available under the
     4     *  terms of the Eclipse Public License v1.0 and Eclipse Distribution License
     5     *  v. 1.0 which accompanies this distribution. The Eclipse Public License is
     6     *  available at http://www.eclipse.org/legal/epl-v10.html and the Eclipse
     7     *  Distribution License is available at
     8     *  http://www.eclipse.org/org/documents/edl-v10.php.
     9     *
    10     *  Contributors:
    11     *      Texas Instruments - initial implementation
    12     * */
    13    /*
    14     *  ======== Sync.xdc ========
    15     */
    16    import xdc.runtime.Error;
    17    import xdc.runtime.Assert;
    18    import xdc.runtime.knl.ISync;
    19    
    20    /*!
    21     *  ======== Sync ========
    22     *  Provides synchronization APIs when an ISync.Handle is available
    23     *
    24     *  The application must first obtain an ISync.Handle. It can get such a handle
    25     *  by directly calling {@link SyncGeneric#create} or
    26     *  {@link SyncSemThread#create}. Then the application can use the generic APIs
    27     *  provided by this module.
    28     */
    29    @DirectCall
    30    
    31    module Sync
    32    {
    33        /*!
    34         *  ======== WaitStatus ========
    35         *  Error codes returned by Sync_wait
    36         */
    37        enum WaitStatus {
    38            WaitStatus_ERROR = -1,
    39            WaitStatus_TIMEOUT = 0,
    40            WaitStatus_SUCCESS = 1
    41        };
    42    
    43        /*!
    44         *  ======== WAIT_FOREVER ========
    45         *  Used to wait forever
    46         */
    47        const UInt WAIT_FOREVER = ISync.WAIT_FOREVER;
    48    
    49        /*!
    50         *  ======== NO_WAIT ========
    51         *  Used to specify no waiting
    52         */
    53        const UInt NO_WAIT = ISync.NO_WAIT;
    54    
    55        /*!
    56         *  ======== Proxy ========
    57         *  Platform-specific implementation
    58         *
    59         *  If ALL `ISync.Handles` were created using the same module
    60         *  (e.g SyncSemProcess), then setting `Proxy` to `SyncSemProcess` and
    61         *  `Sync.Proxy.abstractInstances$` to `false` will improve the
    62         *  performance of the `Sync` APIs.
    63         */
    64        proxy Proxy inherits ISync;
    65    
    66        /*!
    67         *  ======== query ========
    68         *  Query for a particular quality
    69         *
    70         *  FALSE is returned if quality not supported.
    71         *
    72         *  @param(sync)    sync handle
    73         *  @param(qual)    quality
    74         *
    75         *  @a(returns)     TRUE or FALSE
    76         */
    77        Bool query(ISync.Handle sync, Int qual);
    78    
    79        /*!
    80         *  ======== signal ========
    81         *  Called at completion of an activity.
    82         *
    83         *  This function is non-blocking. It is also required that the underlying
    84         *  sync be binary in nature.
    85         *
    86         *  @param(sync)    sync handle
    87         */
    88        Void signal(ISync.Handle sync);
    89    
    90        /*!
    91         *  ======== wait ========
    92         *  Called to wait/poll for completion of an activity.
    93         *
    94         *  This function can block and typically waits for a semaphore to become
    95         *  available.
    96         *
    97         *  Non-blocking implementations should return {@link #WaitStatus_TIMEOUT}.
    98         *
    99         *  @param(sync)        sync handle
   100         *  @param(timeout)     timeout in microseconds
   101         *
   102         *  @a(returns)
   103         *  @p(blist)
   104         *  -{@link #WaitStatus_ERROR} if an error occured.
   105         *  -{@link #WaitStatus_TIMEOUT} denotes timeout.
   106         *  -{@link #WaitStatus_SUCCESS} semaphore was decremented.
   107         *  @p
   108         */
   109        Int wait(ISync.Handle sync, UInt timeout, Error.Block *eb);
   110    }
   111    /*
   112     *  @(#) xdc.runtime.knl; 1, 0, 0,0; 2-20-2019 10:22:55; /db/ztree/library/trees/xdc/xdc-F09/src/packages/
   113     */
   114