diff options
Diffstat (limited to 'FreeRTOS-Plus/Test/CMock/vendor/c_exception/lib/CException.c')
| -rw-r--r-- | FreeRTOS-Plus/Test/CMock/vendor/c_exception/lib/CException.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/FreeRTOS-Plus/Test/CMock/vendor/c_exception/lib/CException.c b/FreeRTOS-Plus/Test/CMock/vendor/c_exception/lib/CException.c new file mode 100644 index 000000000..fdff8f475 --- /dev/null +++ b/FreeRTOS-Plus/Test/CMock/vendor/c_exception/lib/CException.c @@ -0,0 +1,46 @@ +#include "CException.h" + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wmissing-field-initializers" +volatile CEXCEPTION_FRAME_T CExceptionFrames[CEXCEPTION_NUM_ID] = {{ 0 }}; +#pragma GCC diagnostic pop + +//------------------------------------------------------------------------------------------ +// Throw +//------------------------------------------------------------------------------------------ +void Throw(CEXCEPTION_T ExceptionID) +{ + unsigned int MY_ID = CEXCEPTION_GET_ID; + CExceptionFrames[MY_ID].Exception = ExceptionID; + if (CExceptionFrames[MY_ID].pFrame) + { + longjmp(*CExceptionFrames[MY_ID].pFrame, 1); + } + CEXCEPTION_NO_CATCH_HANDLER(ExceptionID); +} + +//------------------------------------------------------------------------------------------ +// Explanation of what it's all for: +//------------------------------------------------------------------------------------------ +/* +#define Try + { <- give us some local scope. most compilers are happy with this + jmp_buf *PrevFrame, NewFrame; <- prev frame points to the last try block's frame. new frame gets created on stack for this Try block + unsigned int MY_ID = CEXCEPTION_GET_ID; <- look up this task's id for use in frame array. always 0 if single-tasking + PrevFrame = CExceptionFrames[CEXCEPTION_GET_ID].pFrame; <- set pointer to point at old frame (which array is currently pointing at) + CExceptionFrames[MY_ID].pFrame = &NewFrame; <- set array to point at my new frame instead, now + CExceptionFrames[MY_ID].Exception = CEXCEPTION_NONE; <- initialize my exception id to be NONE + if (setjmp(NewFrame) == 0) { <- do setjmp. it returns 1 if longjump called, otherwise 0 + if (&PrevFrame) <- this is here to force proper scoping. it requires braces or a single line to be but after Try, otherwise won't compile. This is always true at this point. + +#define Catch(e) + else { } <- this also forces proper scoping. Without this they could stick their own 'else' in and it would get ugly + CExceptionFrames[MY_ID].Exception = CEXCEPTION_NONE; <- no errors happened, so just set the exception id to NONE (in case it was corrupted) + } + else <- an exception occurred + { e = CExceptionFrames[MY_ID].Exception; e=e;} <- assign the caught exception id to the variable passed in. + CExceptionFrames[MY_ID].pFrame = PrevFrame; <- make the pointer in the array point at the previous frame again, as if NewFrame never existed. + } <- finish off that local scope we created to have our own variables + if (CExceptionFrames[CEXCEPTION_GET_ID].Exception != CEXCEPTION_NONE) <- start the actual 'catch' processing if we have an exception id saved away + */ + |