Create the wrapper class SingletonPtr. This provides a safe way to
declare and use singletons. This class allows both the lazy
initialization of a singleton, and allows the singleton to be
garbage collected by the linker if it is never referenced.
This patch also updates the HAL to use SingletonPtr when declaring
singleton mutexes.
We changed the stack size of main thread for RZ_A1H.
We changed "OS_MAINSTKSIZE" from 2048 to 4096.
Because stack shortage was found in the automatic test by the CI System .
The define OS_TCB_SIZE does not match the real stack size. This
leaves the system with less than OS_TASKCNT TCBs and prevents
a single thread configuration. This updates OS_TCB_SIZE to the
correct value to fix the problem.
Wrap software_init_hook so that it can be used or extended from outside the
RTOS. This is desirable so that code can be added to the software_init_hook
without making the RTOS depend on new features or libraries.