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iv_init(3) [debian man page]

iv_init(3)						    ivykis programmer's manual							iv_init(3)

iv_init, iv_deinit, iv_inited - initialise and deinitialise ivykis SYNOPSIS
#include <iv.h> void iv_init(void); void iv_deinit(void); int iv_inited(void); DESCRIPTION
iv_init initialises the current thread's ivykis event loop. Each thread that wants to use ivykis must call iv_init before any other ivykis functions are called. The very first call to iv_init in a process must run to completion before other threads are allowed to call iv_init, but subsequent calls to iv_init can be done concurrently. iv_deinit frees all resources allocated by ivykis in this thread, and should be called before this thread exits. iv_inited returns true if iv_init has been called in this thread. After iv_deinit is called, it will return false. SEE ALSO
ivykis(3), iv_examples(3) ivykis 2010-09-05 iv_init(3)

Check Out this Related Man Page

iv_tls(3)						    ivykis programmer's manual							 iv_tls(3)

iv_tls_user_register, iv_tls_user_ptr - thread-local storage handling for ivykis modules SYNOPSIS
#include <iv_tls.h> struct iv_tls_user { size_t sizeof_state; void (*init_thread)(void *st); void (*deinit_thread)(void *st); }; void iv_tls_user_register(struct iv_tls_user *tu); void *iv_tls_user_ptr(struct iv_tls_user *tu); DESCRIPTION
The iv_tls interface provides thread-local storage handling to ivykis modules. An ivykis module can arrange for an amount of memory to be allocated for its use in each ivykis thread by calling iv_tls_user_register. This must be done before any calls to iv_init have been made in this process, and is typically done from a module initialization function marked as a constructor function. The ->sizeof_state member of the passed-in structure indicates how many bytes of memory the module wants allocated for its use in every ivykis thread. When a thread calls iv_init, ->sizeof_state bytes of memory will be allocated for use by this module in that thread, and initialised to zero. A pointer to this memory area can be obtained by calling iv_tls_user_ptr (which returns NULL in non-ivykis threads). If the specified ->init_thread function pointer is not NULL, it will be invoked at the end of iv_init, with its argument pointing to this thread's memory area allocation for this module. If ->deinit_thread is not NULL, it will be invoked at the start of iv_deinit, or if the thread fails to call iv_deinit before terminating, at thread termination time. The argument passed into ->deinit_thread is the same as for ->init_thread. It is permitted to call any ivykis API functions from the ->init_thread and ->deinit_thread callbacks. There is no explicit serialization on calls to ->init_thread and ->deinit_thread. Care must be taken when calling iv_tls_user_ptr from a signal handler, as there is a time window where it will return a non-NULL value before ->init_thread or after ->deinit_thread have been called. Use of iv_tls for managing thread-local state is preferred over direct use of the __thread keyword, as not all platforms that ivykis runs on provide the __thread keyword. Use of iv_tls for managing thread-local state is preferred over direct use of the pthread_key_create and pthread_setspecific APIs, as iv_tls provides a thread init hook as well as a destructor hook, and properly sequences ->init_thread and ->deinit_thread calls with core ivykis initialization and cleanup. SEE ALSO
iv_init(3) ivykis 2012-03-30 iv_tls(3)

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