Before only the hardware timer's own interrupt was being disabled.
This led to a race condition in the following scenario:
```
Thread1:
hwtimer_remove()
hwtimer_arch_disable_interrupt();
// INTERRUPT -> Thread2 (which has a higher priority than Thread1) gets scheduled
Thread2:
...
hwtimer_remove()
hwtimer_arch_disable_interrupt(); // hwtimer interrupt is already disabled
...
hwtimer_arch_enable_interrupt();
...
// yield | terminate -> Thread1 gets scheduled again
Thread1:
... // these instructions are being run with the hwtimer interrupt enabled
hwtimer_arch_enable_interrupt(); // hwtimer interrupt is already enabled
```
Fixes#924
- Included a collection of cpu-dependent headers in core/include/arch
- Extracted all interfaces that need to be implemented for a cpu
- Created a mapping between those interfaces and the old ones
- added flag for disabling arch interface
- added missing state to lpm_arch interface
- added arch interface for reboot
- fixed newline issues that were pointed out
- documentation fixes to cpu-core interface
and added `UNREACHABLE();` to hint the compiler unreachable lines
added right signature for first parameter of `thread_stack_init()`
added `UNREACHABLE();` macro to `cpu/lpc1768/atom.c` and `cpu/msp430-common/cpu.c`
Closes#726.
The thread state `STATUS_TIMER_WAITING` is not used anymore.
This PR removes the value.
The number in `STATUS_ON_RUNQUEUE` is replaced by a reference.
Change from `void reboot(void)` to `int reboot(int mode)`.
Move reboot definition to core, rename architecture implementations
from reboot to reboot_arch.
Declare reboot mode(s) in kernel.h, reboot_arch in kernel_internal.h
Currently only one reboot mode is handled, its use is enforced.
Rationale:
A reboot function is already defined in <unistd.h> on BSD systems.
(See: http://www.openbsd.org/cgi-bin/man.cgi?query=reboot&sektion=2)
This patch not only allows native to build sensibly on these systems
but also streamlines RIOTs compatability with existing software.
