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Diffstat (limited to 'src/include/unaligned_memory.h')
-rw-r--r-- | src/include/unaligned_memory.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/include/unaligned_memory.h b/src/include/unaligned_memory.h new file mode 100644 index 0000000..27b2f19 --- /dev/null +++ b/src/include/unaligned_memory.h @@ -0,0 +1,43 @@ +#ifndef UNALIGNED_MEMORY_H +#define UNALIGNED_MEMORY_H + +#include <cstring> + +/** + * UnalignedMemory: Safe unaligned memory access. + * + * Some instruction sets, or some instructions in some instruction sets + * require that memory access is aligned to a specific boundary. These + * instructions may trap on unaligned access. + * + * This class provides methods to load and store values at unaligned + * addresses. It ensures that the compiler doesn't generate instructions + * that could trap on the unaligned memory access. + */ + +namespace pinyin{ + template <typename T> + class UnalignedMemory{ + public: + /** + * Read a value from a possibly unaligned memory address. + * + */ + static T load(const void * src) { + T value; + memcpy(&value, src, sizeof(T)); + return value; + } + + /** + * Store a value into a possibly unaligned memory address. + * + */ + static void store(T value, void * dest) { + memcpy(dest, &value, sizeof(T)); + } + }; +}; + + +#endif |