forked from Imagelibrary/rtems
718124e4e5
A new option RTEMS_INTERRUPT_REPLACE is introduced that permits updating the first interrupt handler for the registered interrupt vector and matching argument. If no match is found, the install function fails with RTEMS_UNSATISFIED. The Interrupt Manager Extension offers interrupt handlers with an argument pointer. It is impossible to update two words (handler and argument) atomically on most architectures. In order to avoid an SMP lock in bsp_interrupt_handler_dispatch() which would degrade the interrupt response time an alternative must be provided that makes it possible to tear-down interrupt sources without an SMP lock. Add RTEMS_INTERRUPT_REPLACE option to Interrupt Manager Extension. This enables a clean tear-down of interrupt sources on SMP configurations. Instead of an interrupt handler removal a replacement handler can be installed to silence an interrupt source. This can be used in contexts that allow no sophisticated synchronization (e.g. in atexit() or fatal handlers).
This is the top level directory of the C RTEMS environment. The
following is a description of the contents of each file and
subdirectory directly in this directory:
tests
This directory contains the RTEMS Test Suites. Currently
this includes the following suites:
+ Single Processor Test Suite
+ Multiprocessor Test Suite
+ Timing Test Suite
+ Sample Application Suite
lib
This directory contains src for RTEMS libraries:
libc, board support (including drivers) and libcpu.
exec
This directory contains the source code for the RTEMS executive.