diff options
Diffstat (limited to 'libbuild2/variable.hxx')
| -rw-r--r-- | libbuild2/variable.hxx | 88 |
1 files changed, 54 insertions, 34 deletions
diff --git a/libbuild2/variable.hxx b/libbuild2/variable.hxx index 9a106b5..3eed61e 100644 --- a/libbuild2/variable.hxx +++ b/libbuild2/variable.hxx @@ -16,6 +16,7 @@ #include <libbuild2/types.hxx> #include <libbuild2/utility.hxx> +#include <libbuild2/context.hxx> #include <libbuild2/target-type.hxx> #include <libbuild2/export.hxx> @@ -1018,7 +1019,7 @@ namespace build2 // Variable pool. // - // The global version is protected by the phase mutex. + // The global (as in, context-wide) version is protected by the phase mutex. // class variable_pool { @@ -1161,23 +1162,26 @@ namespace build2 void clear () {map_.clear ();} - variable_pool (): variable_pool (false) {} + variable_pool (): variable_pool (nullptr) {} - // RW access. + // RW access (only for the global pool). // variable_pool& rw () const { - assert (phase == run_phase::load); + assert (global_->phase == run_phase::load); return const_cast<variable_pool&> (*this); } variable_pool& rw (scope&) const {return const_cast<variable_pool&> (*this);} - private: - LIBBUILD2_SYMEXPORT static variable_pool instance; + // Entities that can access bypassing the lock proof. + // + friend class parser; + friend class scope; + private: LIBBUILD2_SYMEXPORT variable& insert (string name, const value_type*, @@ -1191,17 +1195,6 @@ namespace build2 const variable_visibility* = nullptr, const bool* = nullptr) const; - // Entities that can access bypassing the lock proof. - // - friend class parser; - friend class scope; - friend LIBBUILD2_SYMEXPORT variable_overrides reset (const strings&); - - public: - // For var_pool initialization. - // - LIBBUILD2_SYMEXPORT static const variable_pool& cinstance; - // Variable map. // private: @@ -1258,16 +1251,16 @@ namespace build2 private: std::multiset<pattern> patterns_; - // Global pool flag. + // Global pool flag/context. // private: + friend class context; + explicit - variable_pool (bool global): global_ (global) {} + variable_pool (context* global): global_ (global) {} - bool global_; + context* global_; }; - - LIBBUILD2_SYMEXPORT extern const variable_pool& var_pool; } // variable_map @@ -1361,7 +1354,9 @@ namespace build2 lookup operator[] (const string& name) const { - const variable* var (var_pool.find (name)); + const variable* var (ctx != nullptr + ? ctx->var_pool.find (name) + : nullptr); return var != nullptr ? operator[] (*var) : lookup (); } @@ -1402,7 +1397,7 @@ namespace build2 // Note that the variable is expected to have already been registered. // value& - assign (const string& name) {return insert (var_pool[name]).first;} + assign (const string& name) {return insert (ctx->var_pool[name]).first;} // As above but also return an indication of whether the new value (which // will be NULL) was actually inserted. Similar to find(), if typed is @@ -1436,11 +1431,18 @@ namespace build2 // (e.g., scopes, etc). // explicit - variable_map (bool global = false): global_ (global) {} + variable_map (context& c, bool global = false) + : ctx (&c), global_ (global) {} void clear () {m_.clear ();} + // Implementation details. + // + public: + explicit + variable_map (context* c): ctx (c) {} + private: friend class variable_type_map; @@ -1448,10 +1450,13 @@ namespace build2 typify (const value_data&, const variable&) const; private: - bool global_; + context* ctx; map_type m_; + bool global_; }; + LIBBUILD2_SYMEXPORT extern const variable_map empty_variable_map; + // Value caching. Used for overrides as well as target type/pattern-specific // append/prepend. // @@ -1519,6 +1524,18 @@ namespace build2 map_type m_; }; + // Variable override cache. Only on project roots (in scope::root_extra) + // plus a global one (in context) for the global scope. + // + // The key is the variable plus the innermost (scope-wise) variable map to + // which this override applies. See scope::find_override() for details. + // + // Note: since it can be modified on any lookup (including during the + // execute phase), the cache is protected by a mutex shard. + // + class variable_override_cache: + public variable_cache<pair<const variable*, const variable_map*>> {}; + // Target type/pattern-specific variables. // class variable_pattern_map @@ -1528,13 +1545,13 @@ namespace build2 using const_iterator = map_type::const_iterator; using const_reverse_iterator = map_type::const_reverse_iterator; - explicit - variable_pattern_map (bool global): global_ (global) {} + variable_pattern_map (context& c, bool global) + : ctx (c), global_ (global) {} variable_map& operator[] (const string& v) { - return map_.emplace (v, variable_map (global_)).first->second; + return map_.emplace (v, variable_map (ctx, global_)).first->second; } const_iterator begin () const {return map_.begin ();} @@ -1544,8 +1561,10 @@ namespace build2 bool empty () const {return map_.empty ();} private: - bool global_; + context& ctx; map_type map_; + bool global_; + }; class LIBBUILD2_SYMEXPORT variable_type_map @@ -1555,13 +1574,13 @@ namespace build2 variable_pattern_map>; using const_iterator = map_type::const_iterator; - explicit - variable_type_map (bool global): global_ (global) {} + variable_type_map (context& c, bool global): ctx (c), global_ (global) {} variable_pattern_map& operator[] (const target_type& t) { - return map_.emplace (t, variable_pattern_map (global_)).first->second; + return map_.emplace ( + t, variable_pattern_map (ctx, global_)).first->second; } const_iterator begin () const {return map_.begin ();} @@ -1585,8 +1604,9 @@ namespace build2 cache; private: - bool global_; + context& ctx; map_type map_; + bool global_; }; } |