globus_handle_table - Online Linux Manual PageSection : 3
Updated : Tue Jan 26 2021
Source : Version 18.9
Note : globus_common

NAMEglobus_handle_table − Handle Table for Reference Counting Data
 − Handle Table for Reference Counting Data​.

SYNOPSIS

Macros#define GLOBUS_NULL_HANDLE

Typedefstypedef struct globus_l_handle_table_s * globus_handle_table_t
Handle table abstract type​.
typedef int globus_handle_t
Handle abstract type​.
typedef void(* globus_handle_destructor_t) (void *datum)
Handle datum destructor​.

Functionsint globus_handle_table_init (globus_handle_table_t *handle_table, globus_handle_destructor_t destructor)
int globus_handle_table_destroy (globus_handle_table_t *handle_table)
Destroy a handle table​.
globus_handle_t globus_handle_table_insert (globus_handle_table_t *handle_table, void *value, int initial_refs)
globus_bool_t globus_handle_table_increment_reference_by (globus_handle_table_t *handle_table, globus_handle_t handle, unsigned int inc)
Increment the reference count for handle​.
globus_bool_t globus_handle_table_decrement_reference (globus_handle_table_t *handle_table, globus_handle_t handle)
Remove a reference to a handle​.
globus_bool_t globus_handle_table_increment_reference (globus_handle_table_t *handle_table, globus_handle_t handle)
Add a reference to a handle table entry​.
void * globus_handle_table_lookup (globus_handle_table_t *handle_table, globus_handle_t handle)
Resolve a handle its datum​.

Detailed DescriptionHandle Table for Reference Counting Data​. The globus_handle_table_t abstraction provides a reference-counting handle table to automatically free data when there are no more references to it​. Each datum in the globus_handle_table_t container has a count associated with it which may be incremented and decremented in single steps or by an increment​. While a handle has any references to it, the globus_handle_table_lookup() will return the datum associated with the handle, otherwise it will return NULL​. The value of a globus_handle_t is not reused until INT_MAX data have been inserted into the handle table​.

Macro Definition Documentation

#define GLOBUS_NULL_HANDLEInvalid handle value

Typedef Documentation

typedef void(* globus_handle_destructor_t) (void *datum)Handle datum destructor​. Parameters datum Datum to destroy

Function Documentation

globus_bool_t globus_handle_table_decrement_reference (globus_handle_table_t * handle_table, globus_handle_t handle)Remove a reference to a handle​. Remove a reference to a handle table entry, calling its destructor if no more references exist for the handle​. Parameters handle_table The table that the handle was created in​.
handle

 The handle to a datum to decrement the reference count for​.
Returns The globus_handle_table_decrement_reference() function returns a boolean value indicating whether the handle still references a valid datum​.

int globus_handle_table_destroy (globus_handle_table_t * handle_table)Destroy a handle table​. Destroy a handle table and call the destructor for all objects associated with it​. Parameters handle_table Pointer to the handle table to destroy

globus_bool_t globus_handle_table_increment_reference (globus_handle_table_t * handle_table, globus_handle_t handle)Add a reference to a handle table entry​. Parameters handle_table The table that the handle was created in​.
handle

 The handle to a datum to increment the reference count for​.
Returns The globus_handle_table_increment_reference() function returns a boolean value indicating whether the handle still references a valid datum​.

globus_bool_t globus_handle_table_increment_reference_by (globus_handle_table_t * handle_table, globus_handle_t handle, unsigned int inc)Increment the reference count for handle​. Parameters handle_table The table that the handle was created in​.
handle

 The handle to a datum to increment the reference count for​.
inc The number of references to add the handle​.
Returns The globus_handle_table_increment_reference_by() function returns a boolean value indicating whether the handle still references a valid datum​.

int globus_handle_table_init (globus_handle_table_t * handle_table, globus_handle_destructor_t destructor)Initialize a table of unique reference counted handles​. Parameters handle_table the table of unique handles we want to use​.
destructor Function to call to free the data associated with a handle when the handle's reference count reaches 0 or the handle table is destroyed​.

globus_handle_t globus_handle_table_insert (globus_handle_table_t * handle_table, void * value, int initial_refs)Insert a datum into a handle table Insert a value into the handle table, and return a unique handle to it​. Parameters handle_table Handle table to add the value to
value The value to insert into the table
initial_refs The initial reference count of this value in the table
Returns The globus_handle_table_insert() function returns a unique handle to value​.

void* globus_handle_table_lookup (globus_handle_table_t * handle_table, globus_handle_t handle)Resolve a handle its datum​. Parameters handle_table The table that the handle was created in​.
handle

 The handle to a datum to resolve
Returns The globus_handle_table_lookup() function returns the datum associated with the handle in the handle table, or NULL if the handle does not reference valid data​.

AuthorGenerated automatically by Doxygen for globus_common from the source code​.
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