-- -- $Id$ -- Overview of newlib support (newlib is from CYGNUS) Each task can have its own libc state including: open stdio files strtok multi precision arithmetic state etc. This is implemented by a reentrancy data structure for each task. When a task is "started" (in RTEMS sense) the reentrancy structure is allocated. Its address is stored in notepad[NOTEPAD_LAST]. When task is switched to, the value of global variable _impure_ptr is changed to the value of the new tasks reentrancy structure. When a task is deleted atexit() processing (for that task) happens task's stdio buffers are flushed When exit(3) is called calling task's atexit processing done global libc state atexit processing done (this will include any atexit routines installed by drivers) executive is shutdown causes a context switch back to bsp land NOTE: libc extension are installed by bsp_libc_init() iff we are using clock interrupts. This hack is necessary to allow the tmtests to avoid timing the extensions.