The nanostack hal's critical section uses a mutex for mutual exclusion,
which is nice for many use cases. But when one needs to use the critical
section from interrupts, the RTX will have a assertion failure and panic.
Add a configurable for mbed_lib, which can be used to enable a alternative
version of critical section, which uses the underlying OS primitives, which
disables the interrupts.
Note: the default behavior is not changed, one needs to override the
"nanostack-hal.critical-section-usable-from-interrupt" to have "true".
Reason for this change is that there is a need for sending events using
nanostack event queue from interrupt context, eg. from a socket callback.
The thread flag signaling mechanism is problematic if a separate event
loop thread is not used. The problem is, that one needs to know the
thread id of the loop dispathcer, and that knowledge can be derived
only from the caller thread of the initialization function.
Remove the magic connection from caller thread to dispatcher thread
by using event flags instead of thread flags on signaling. As the
event flags require the massive amount 20 bytes of RAM whereas
thread flags requires none, keep the code behind flag.
The separate eventloop thread may not be necessary on all uses, as one
can use the existing main thread for event dispatching. Add a
conditional nanostack-hal.event-loop-dispatch-from-application, which
disables the thread creation.
Note: the ns_hal_init must be ran from the same thread which will be
used to execute the event loop later.
Add the attribute flash to enable priority inheritance and robust mode.
The robust flag allows mutexes held by terminated threads to be
properly released.
Build jobs are failing due build error "arm_hal_timer.cpp:50:5:
error: reference to 'callback' is ambiguous".
Fix the build error by renaming callback to arm_hal_callback to
avoid collision with callback defined in ./mbed-os/hal/api/Callback.h
Move the library files used by both nanostack and client into a common
location. This allows both client and nanostack to be built stand-alone.
The patch moves the following libraries into a common location:
-mbed-client-c
-mbed-client-randlib
-mbed-trace
-nanostack-hal-mbed-cmsis-rtos
-nanostack-libservice
-sal-stack-nanostack-eventloop
And moves the library 'coap-service' from client into nanostack.
Tero Jääskö
Kevin Bracey
Seppo Takalo
Russ Butler
Bartek Szatkowski
Sam Grove
Arto Kinnunen
Russ Butler