module xdc.runtime.knl.GateProcessSupportNull
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Empty IGateProcessSupport implementation

C synopsis target-domain sourced in xdc/runtime/knl/GateProcessSupportNull.xdc
#include <xdc/runtime/knl/GateProcessSupportNull.h>
Functions
Void
GateProcessSupportNull_construct// Initialize a new instance object inside the provided structure(GateProcessSupportNull_Struct *structP, const GateProcessSupportNull_Params *params);
GateProcessSupportNull_Handle
GateProcessSupportNull_create// Allocate and initialize a new instance object and return its handle(const GateProcessSupportNull_Params *params, Error_Block *eb);
Void
GateProcessSupportNull_delete// Finalize and free this previously allocated instance object, setting the referenced handle to NULL(GateProcessSupportNull_Handle *handleP);
Void
GateProcessSupportNull_destruct// Finalize the instance object inside the provided structure(GateProcessSupportNull_Struct *structP);
Void
GateProcessSupportNull_Params_init// Initialize this config-params structure with supplier-specified defaults before instance creation(GateProcessSupportNull_Params *params);
Functions common to all IGateProvider modules
IArg 
GateProcessSupportNull_enter// Enter this gate(GateProcessSupportNull_Handle handle);
Void 
GateProcessSupportNull_leave// Leave this gate(GateProcessSupportNull_Handle handle, IArg key);
Bool 
GateProcessSupportNull_query// Runtime test for a particular gate quality(Int qual);
Functions common to all IGateProcessSupport modules
Int 
GateProcessSupportNull_getReferenceCount// Get the number of processes with references to this Gate(GateProcessSupportNull_Handle handle, Error_Block *err);
Functions common to all target instances
GateProcessSupportNull_handle// Convert this instance structure pointer into an instance handle, GateProcessSupportNull_Handle_downCast// conditionally move one level down the inheritance hierarchy; NULL upon failure, GateProcessSupportNull_Handle_downCast2// conditionally move 2 levels down the inheritance hierarchy; NULL upon failure, GateProcessSupportNull_Handle_downCast3// conditionally move 3 levels down the inheritance hierarchy; NULL upon failure, GateProcessSupportNull_Handle_label// The label associated with this instance object, GateProcessSupportNull_Handle_name// The name of this instance object, GateProcessSupportNull_Handle_upCast// unconditionally move one level up the inheritance hierarchy, GateProcessSupportNull_Handle_upCast2// unconditionally move 2 levels up the inheritance hierarchy, GateProcessSupportNull_Handle_upCast3// unconditionally move 3 levels up the inheritance hierarchy, GateProcessSupportNull_Object_count// The number of statically-created instance objects, GateProcessSupportNull_Object_first// The handle of the first dynamically-created instance object, or NULL, GateProcessSupportNull_Object_get// The handle of the i-th statically-created instance object (array == NULL), GateProcessSupportNull_Object_heap// The heap used to allocate dynamically-created instance objects, GateProcessSupportNull_Object_next// The handle of the next dynamically-created instance object, or NULL, GateProcessSupportNull_struct// Convert this instance handle into an instance structure pointer
Functions common to all target modules
GateProcessSupportNull_Module_getMask// Returns the diagnostics mask for this module, GateProcessSupportNull_Module_hasMask// Test whether this module has a diagnostics mask, GateProcessSupportNull_Module_heap// The heap from which this module allocates memory, GateProcessSupportNull_Module_id// Get this module's unique id, GateProcessSupportNull_Module_setMask// Set the diagnostics mask for this module, GateProcessSupportNull_Module_startupDone// Test if this module has completed startup
Defines
#define
GateProcessSupportNull_GETREFCOUNT_FAILED// Status returned by getReferenceCount when there is an error (Int)-1
#define
GateProcessSupportNull_Q_BLOCKING// Blocking quality (Int)1
#define
GateProcessSupportNull_Q_PREEMPTING// Preempting quality (Int)2
Typedefs
typedef GateProcessSupportNull_Object *
GateProcessSupportNull_Handle// Client reference to an instance object;
typedef struct
GateProcessSupportNull_Object// Opaque internal representation of an instance object GateProcessSupportNull_Object;
typedef struct
GateProcessSupportNull_Params// Instance config-params structure ...
typedef struct
GateProcessSupportNull_Struct// Opaque client structure large enough to hold an instance object GateProcessSupportNull_Struct;
 
 
const GateProcessSupportNull_GETREFCOUNT_FAILED
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Status returned by getReferenceCount when there is an error

C synopsis target-domain
#define GateProcessSupportNull_GETREFCOUNT_FAILED (Int)-1
 
 
const GateProcessSupportNull_Q_BLOCKING
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Blocking quality

C synopsis target-domain
#define GateProcessSupportNull_Q_BLOCKING (Int)1
 
DETAILS
Gates with this "quality" may cause the calling thread to block; i.e., suspend execution until another thread leaves the gate.
 
const GateProcessSupportNull_Q_PREEMPTING
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Preempting quality

C synopsis target-domain
#define GateProcessSupportNull_Q_PREEMPTING (Int)2
 
DETAILS
Gates with this "quality" allow other threads to preempt the thread that has already entered the gate.
 
GateProcessSupportNull_query()  // module-wide
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Runtime test for a particular gate quality

C synopsis target-domain
Bool GateProcessSupportNull_query(Int qual);
 
ARGUMENTS
qual — constant describing a quality
RETURNS
Returns TRUE if the gate has the given quality, and FALSE otherwise, which includes the case when the gate does not recognize the constant describing the quality.
Module-Wide Built-Ins
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C synopsis target-domain
Types_ModuleId GateProcessSupportNull_Module_id();
// Get this module's unique id
 
Bool GateProcessSupportNull_Module_startupDone();
// Test if this module has completed startup
 
IHeap_Handle GateProcessSupportNull_Module_heap();
// The heap from which this module allocates memory
 
Bool GateProcessSupportNull_Module_hasMask();
// Test whether this module has a diagnostics mask
 
Bits16 GateProcessSupportNull_Module_getMask();
// Returns the diagnostics mask for this module
 
Void GateProcessSupportNull_Module_setMask(Bits16 mask);
// Set the diagnostics mask for this module
Instance Object Types
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C synopsis target-domain
typedef struct GateProcessSupportNull_Object GateProcessSupportNull_Object;
// Opaque internal representation of an instance object
 
typedef GateProcessSupportNull_Object *GateProcessSupportNull_Handle;
// Client reference to an instance object
 
typedef struct GateProcessSupportNull_Struct GateProcessSupportNull_Struct;
// Opaque client structure large enough to hold an instance object
 
GateProcessSupportNull_Handle GateProcessSupportNull_handle(GateProcessSupportNull_Struct *structP);
// Convert this instance structure pointer into an instance handle
 
GateProcessSupportNull_Struct *GateProcessSupportNull_struct(GateProcessSupportNull_Handle handle);
// Convert this instance handle into an instance structure pointer
Instance Config Parameters
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C synopsis target-domain
typedef struct GateProcessSupportNull_Params {
// Instance config-params structure
    IInstance_Params *instance;
    // Common per-instance configs
    Int key;
    // globally unique key for SysV-style semaphore
} GateProcessSupportNull_Params;
 
Void GateProcessSupportNull_Params_init(GateProcessSupportNull_Params *params);
// Initialize this config-params structure with supplier-specified defaults before instance creation
 
config GateProcessSupportNull_key  // instance
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globally unique key for SysV-style semaphore

C synopsis target-domain
struct GateProcessSupportNull_Params {
      ...
    Int key;
 
Instance Creation
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C synopsis target-domain
GateProcessSupportNull_Handle GateProcessSupportNull_create(const GateProcessSupportNull_Params *params, Error_Block *eb);
// Allocate and initialize a new instance object and return its handle
 
Void GateProcessSupportNull_construct(GateProcessSupportNull_Struct *structP, const GateProcessSupportNull_Params *params);
// Initialize a new instance object inside the provided structure
ARGUMENTS
params — per-instance config params, or NULL to select default values (target-domain only)
eb — active error-handling block, or NULL to select default policy (target-domain only)
DETAILS
This function creates a new GateProcess object which is initialized to count. All gates created with the same key reference the same underlying synchronization object and work between processes. The underlying synchronization object should be automatically deleted when all references to it have been deleted, and the reference count should An implementation for a platform on which this is technically impossible (e.g. an operating system that does not support multiple processes) may provide a 'toy' implemenation with behavior matching that of IGateProcessSupport.
Instance Deletion
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C synopsis target-domain
Void GateProcessSupportNull_delete(GateProcessSupportNull_Handle *handleP);
// Finalize and free this previously allocated instance object, setting the referenced handle to NULL
 
Void GateProcessSupportNull_destruct(GateProcessSupportNull_Struct *structP);
// Finalize the instance object inside the provided structure
 
GateProcessSupportNull_enter()  // instance
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Enter this gate

C synopsis target-domain
IArg GateProcessSupportNull_enter(GateProcessSupportNull_Handle handle);
 
ARGUMENTS
handle — handle of a previously-created GateProcessSupportNull instance object
DETAILS
Each gate provider can implement mutual exclusion using different algorithms; e.g., disabling all scheduling, disabling the scheduling of all threads below a specified "priority level", suspending the caller when the gate has been entered by another thread and re-enabling it when the the other thread leaves the gate. However, in all cases, after this method returns that caller has exclusive access to the data protected by this gate.
A thread may reenter a gate without blocking or failing.
RETURNS
Returns a "key" that is used to leave this gate; this value is used to restore thread preemption to the state that existed just prior to entering this gate.
 
GateProcessSupportNull_getReferenceCount()  // instance
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Get the number of processes with references to this Gate

C synopsis target-domain
Int GateProcessSupportNull_getReferenceCount(GateProcessSupportNull_Handle handle, Error_Block *err);
 
ARGUMENTS
handle — handle of a previously-created GateProcessSupportNull instance object
err — Pointer to Error.Block
RETURNS
Returns the number of processes that possess a reference to this gate, or GETREFCOUNT_FAILED if an error occured. A 'toy' implementation should always return 0.
 
GateProcessSupportNull_leave()  // instance
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Leave this gate

C synopsis target-domain
Void GateProcessSupportNull_leave(GateProcessSupportNull_Handle handle, IArg key);
 
ARGUMENTS
handle — handle of a previously-created GateProcessSupportNull instance object
key — the value returned by a matching call to enter
DETAILS
This method is only called by threads that have previously entered this gate via enter. After this method returns, the caller must not access the data structure protected by this gate (unless the caller has entered the gate more than once and other calls to leave remain to balance the number of previous calls to enter).
Instance Convertors
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C synopsis target-domain
IGateProcessSupport_Handle GateProcessSupportNull_Handle_upCast(GateProcessSupportNull_Handle handle);
// unconditionally move one level up the inheritance hierarchy
 
GateProcessSupportNull_Handle GateProcessSupportNull_Handle_downCast(IGateProcessSupport_Handle handle);
// conditionally move one level down the inheritance hierarchy; NULL upon failure
 
IGateThreadSupport_Handle GateProcessSupportNull_Handle_upCast2(GateProcessSupportNull_Handle handle);
// unconditionally move 2 levels up the inheritance hierarchy
 
GateProcessSupportNull_Handle GateProcessSupportNull_Handle_downCast2(IGateThreadSupport_Handle handle);
// conditionally move 2 levels down the inheritance hierarchy; NULL upon failure
 
IGateProvider_Handle GateProcessSupportNull_Handle_upCast3(GateProcessSupportNull_Handle handle);
// unconditionally move 3 levels up the inheritance hierarchy
 
GateProcessSupportNull_Handle GateProcessSupportNull_Handle_downCast3(IGateProvider_Handle handle);
// conditionally move 3 levels down the inheritance hierarchy; NULL upon failure
Instance Built-Ins
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C synopsis target-domain
Int GateProcessSupportNull_Object_count();
// The number of statically-created instance objects
 
GateProcessSupportNull_Handle GateProcessSupportNull_Object_get(GateProcessSupportNull_Object *array, Int i);
// The handle of the i-th statically-created instance object (array == NULL)
 
GateProcessSupportNull_Handle GateProcessSupportNull_Object_first();
// The handle of the first dynamically-created instance object, or NULL
 
GateProcessSupportNull_Handle GateProcessSupportNull_Object_next(GateProcessSupportNull_Handle handle);
// The handle of the next dynamically-created instance object, or NULL
 
IHeap_Handle GateProcessSupportNull_Object_heap();
// The heap used to allocate dynamically-created instance objects
 
Types_Label *GateProcessSupportNull_Handle_label(GateProcessSupportNull_Handle handle, Types_Label *buf);
// The label associated with this instance object
 
String GateProcessSupportNull_Handle_name(GateProcessSupportNull_Handle handle);
// The name of this instance object
 
XDCscript usage meta-domain sourced in xdc/runtime/knl/GateProcessSupportNull.xdc
var GateProcessSupportNull = xdc.useModule('xdc.runtime.knl.GateProcessSupportNull');
module-wide constants & types
    const GateProcessSupportNull.GETREFCOUNT_FAILED// Status returned by getReferenceCount when there is an error = -1;
    const GateProcessSupportNull.Q_BLOCKING// Blocking quality = 1;
    const GateProcessSupportNull.Q_PREEMPTING// Preempting quality = 2;
module-wide config parameters
    GateProcessSupportNull.common$// Common module configuration parameters = Types.Common$ undefined;
module-wide functions
    GateProcessSupportNull.queryMeta// Configuration time test for a particular gate quality(Int qual) returns Bool
per-instance config parameters
    var params = new GateProcessSupportNull.Params// Instance config-params object;
        params.key// globally unique key for SysV-style semaphore = Int -1;
per-instance creation
    var inst = GateProcessSupportNull.create// Create an instance-object(params);
 
 
const GateProcessSupportNull.GETREFCOUNT_FAILED
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Status returned by getReferenceCount when there is an error

XDCscript usage meta-domain
const GateProcessSupportNull.GETREFCOUNT_FAILED = -1;
 
C SYNOPSIS
GateProcessSupportNull_GETREFCOUNT_FAILED
 
const GateProcessSupportNull.Q_BLOCKING
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Blocking quality

XDCscript usage meta-domain
const GateProcessSupportNull.Q_BLOCKING = 1;
 
DETAILS
Gates with this "quality" may cause the calling thread to block; i.e., suspend execution until another thread leaves the gate.
C SYNOPSIS
GateProcessSupportNull_Q_BLOCKING
 
const GateProcessSupportNull.Q_PREEMPTING
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Preempting quality

XDCscript usage meta-domain
const GateProcessSupportNull.Q_PREEMPTING = 2;
 
DETAILS
Gates with this "quality" allow other threads to preempt the thread that has already entered the gate.
C SYNOPSIS
GateProcessSupportNull_Q_PREEMPTING
 
metaonly config GateProcessSupportNull.common$  // module-wide
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Common module configuration parameters

XDCscript usage meta-domain
GateProcessSupportNull.common$ = Types.Common$ undefined;
 
DETAILS
All modules have this configuration parameter. Its name contains the '$' character to ensure it does not conflict with configuration parameters declared by the module. This allows new configuration parameters to be added in the future without any chance of breaking existing modules.
 
metaonly GateProcessSupportNull.queryMeta()  // module-wide
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Configuration time test for a particular gate quality

XDCscript usage meta-domain
GateProcessSupportNull.queryMeta(Int qual) returns Bool
 
ARGUMENTS
qual — constant describing a quality
RETURNS
Returns TRUE if the gate has the given quality, and FALSE otherwise, which includes the case when the gate does not recognize the constant describing the quality.
Instance Config Parameters
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XDCscript usage meta-domain
var params = new GateProcessSupportNull.Params;
// Instance config-params object
    params.key = Int -1;
    // globally unique key for SysV-style semaphore
 
config GateProcessSupportNull.key  // instance
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globally unique key for SysV-style semaphore

XDCscript usage meta-domain
var params = new GateProcessSupportNull.Params;
  ...
params.key = Int -1;
 
C SYNOPSIS
null
Instance Creation
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XDCscript usage meta-domain
var params = new GateProcessSupportNull.Params;
// Allocate instance config-params
params.config =   ...
// Assign individual configs
 
var inst = GateProcessSupportNull.create(params);
// Create an instance-object
ARGUMENTS
params — per-instance config params, or NULL to select default values (target-domain only)
eb — active error-handling block, or NULL to select default policy (target-domain only)
DETAILS
This function creates a new GateProcess object which is initialized to count. All gates created with the same key reference the same underlying synchronization object and work between processes. The underlying synchronization object should be automatically deleted when all references to it have been deleted, and the reference count should An implementation for a platform on which this is technically impossible (e.g. an operating system that does not support multiple processes) may provide a 'toy' implemenation with behavior matching that of IGateProcessSupport.
generated on Thu, 01 Mar 2012 16:58:45 GMT