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| author | Boris Kolpackov <boris@codesynthesis.com> | 2017-02-13 09:48:12 +0200 |
|---|---|---|
| committer | Boris Kolpackov <boris@codesynthesis.com> | 2017-02-13 12:42:42 +0200 |
| commit | 737877e62467b924eea0a43eab68258b0c13db78 (patch) | |
| tree | 3fe2f539a21ce0407cdaa908a9af56b4cf8087e0 /build2/scope | |
| parent | 38290dacd8faab166774d757a1e09807e57e9ba5 (diff) | |
Add MT-safe variable_cache, use for variable overrides
Diffstat (limited to 'build2/scope')
| -rw-r--r-- | build2/scope | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/build2/scope b/build2/scope index 64aaf24..2b86200 100644 --- a/build2/scope +++ b/build2/scope @@ -177,6 +177,18 @@ namespace build2 // variable_type_map target_vars; + // Variable override cache (project root and global scope only). + // + // The key is the variable plus the innermost (scope-wise) variable map to + // which this override applies. See find_override() for details. + // + // Note: since it can be modified on any lookup (including during the + // execute phase), the cache is protected by its own mutex shard. + // + mutable + variable_cache<pair<const variable*, const variable_map*>> + override_cache; + // Meta/operations supported by this project (set on the root // scope only). // |