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| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/sbitmap.h | 25 |
2 files changed, 29 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index cbb70a79428..79f79ebc55b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2016-07-26 Trevor Saunders <tbsaunde+gcc@tbsaunde.org> + + * sbitmap.h (auto_sbitmap): New class. + 2016-07-26 Alan Modra <amodra@gmail.com> PR target/72103 diff --git a/gcc/sbitmap.h b/gcc/sbitmap.h index c2081710bd2..bd734f96edd 100644 --- a/gcc/sbitmap.h +++ b/gcc/sbitmap.h @@ -256,4 +256,29 @@ extern int bitmap_last_set_bit (const_sbitmap); extern void debug_bitmap (const_sbitmap); extern sbitmap sbitmap_realloc (sbitmap, unsigned int); + +/* a class that ties the lifetime of a sbitmap to its scope. */ +class auto_sbitmap +{ +public: + explicit auto_sbitmap (unsigned int size) : + m_bitmap (sbitmap_alloc (size)) {} + ~auto_sbitmap () { sbitmap_free (m_bitmap); } + + /* Allow calling sbitmap functions on our bitmap. */ + operator sbitmap () { return m_bitmap; } + +private: + /* Prevent making a copy that refers to our sbitmap. */ + auto_sbitmap (const auto_sbitmap &); + auto_sbitmap &operator = (const auto_sbitmap &); +#if __cplusplus >= 201103L + auto_sbitmap (auto_sbitmap &&); + auto_sbitmap &operator = (auto_sbitmap &&); +#endif + + /* The bitmap we are managing. */ + sbitmap m_bitmap; +}; + #endif /* ! GCC_SBITMAP_H */ |