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

NAMEglobus_thread_key − Thread-Specific Storage
 − Thread-Specific Storage​.

SYNOPSIS

Functionsint globus_thread_key_create (globus_thread_key_t *key, globus_thread_key_destructor_func_t destructor)
Create a key for thread-specific storage​.
int globus_thread_key_delete (globus_thread_key_t key)
Delete a thread-local storage key​.
void * globus_thread_getspecific (globus_thread_key_t key)
Get a thread-specific data value​.
int globus_thread_setspecific (globus_thread_key_t key, void *value)
Set a thread-specific data value​.

Detailed DescriptionThread-Specific Storage​. The globus_thread_key_t data type acts as a key to thread-specific storage​. For each key created by globus_thread_key_create(), each thread may store and retrieve its own value​.

Function Documentation

void* globus_thread_getspecific (globus_thread_key_t key)Get a thread-specific data value​. The globus_thread_getspecific() function returns the value associated with the thread-specific data key passed as its first parameter​. This function returns NULL if the value has not been set by the current thread​. The return value is undefined if the key is not valid​. Parameters key Thread-specific data key to look up​. Returns The value passed to a previous call to globus_thread_setspecific() in the current thread for this key​.

int globus_thread_key_create (globus_thread_key_t * key, globus_thread_key_destructor_func_t destructor)Create a key for thread-specific storage​. The globus_thread_key_create() function creates a new key for thread-specific data​. The new key will be available for all threads to store a distinct value​. If the function pointer destructor is non-NULL, then that function will be invoked when a thread exits that has a non-NULL value associated with the key​. Parameters key Pointer to be set to the new key​.
destructor Pointer to a function to call when a thread exits to free the key's value​.
Returns On success, globus_thread_create_key() will create a new key to thread-local storage and return GLOBUS_SUCCESS​. If an error occurs, then the value of key is undefined and globus_thread_create_key() returns an implementation-specific non-zero error value​.

int globus_thread_key_delete (globus_thread_key_t key)Delete a thread-local storage key​. The globus_thread_key_delete() function deletes the key used for a thread-local storage association​. The destructor function for this key will no longer be called after this function returns​. The behavior of subsequent calls to globus_thread_getspecific() or globus_thread_setspecific() with this key will be undefined​. Parameters key Key to destroy​. Returns On success, globus_thread_key_delete() will delete a thread-local storage key and return GLOBUS_SUCCESS​. If an error occurs, then the value of key is undefined and globus_thread_create_key() returns an implementation-specific non-zero error value​.

int globus_thread_setspecific (globus_thread_key_t key, void * value)Set a thread-specific data value​. The globus_thread_setspecific() function associates a thread-specific value with a data key​. If the key had a previous value set in the current thread, it is replaced, but the destructor function is not called for the old value​. Parameters key Thread-specific data key to store​.
value A pointer to data to store as the thread-specific data for this thread​.
Returns On success, globus_thread_setspecific() stores value in the thread-specific data for the specified key and returns GLOBUS_SUCCESS​. If an error occurs, globus_thread_setspecific() returns an implementation-specific non-zero error code and does not modify the key's value for this thread​.

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