Toolchain attributes - use C++11/C11 #10837
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The `int : 0` bitfield this produced could force integer alignment onto the structure it was placed in, making a structure that should be 1 byte be 4 bytes. Change `int` to `bool` to minimise alignment impact - should be to nothing. Alignment/size problem was revealed in a `sizeof` check in an `Atomic<uint8_t>` test.
If available, we can use standard static_assert.
Newer language standards have standard forms for `MBED_NORETURN` and `MBED_ALIGN` attributes. Use them when available. C++14 also adds `[[deprecated]]`, but as it needs to go in the middle of structure definitions as `class [[deprecated]] MyClass`, it's not a total drop-in-replacemend for `MBED_DEPRECATED`, so that is not attempted here. Using standard forms increases the chances that code analysis tools such Coverity will recognise them - particularly important for "no return".
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@kjbracey-arm, thank you for your changes. |
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@bulislaw one for you perhaps to review ? |
bulislaw
approved these changes
Jun 20, 2019
0xc0170
approved these changes
Jul 4, 2019
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CI started |
Test run: SUCCESSSummary: 11 of 11 test jobs passed |
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Description
Use standard C++11/C11 forms for
MBED_STRUCT_STATIC_ASSERT,MBED_NORETURNandMBED_ALIGNwhen available.Using standard forms increases the chances that code analysis tools such Coverity will recognise them - particularly important for "no return".
Fix excess alignment problem caused by non-C++11
MBED_STRUCT_STATIC_ASSERTfallback usingint.Pull request type