diff options
Diffstat (limited to 'libbuild2/context.hxx')
| -rw-r--r-- | libbuild2/context.hxx | 114 |
1 files changed, 94 insertions, 20 deletions
diff --git a/libbuild2/context.hxx b/libbuild2/context.hxx index 27c3cc0..33fc892 100644 --- a/libbuild2/context.hxx +++ b/libbuild2/context.hxx @@ -21,7 +21,7 @@ namespace build2 { class file_cache; - class loaded_modules_lock; + class module_libraries_lock; class LIBBUILD2_SYMEXPORT run_phase_mutex { @@ -120,6 +120,16 @@ namespace build2 } }; + // Match-only level. + // + // See the --match-only and --load-only options for background. + // + enum class match_only_level + { + alias, // Match only alias{} targets. + all // Match all targets. + }; + // A build context encapsulates the state of a build. It is possible to have // multiple build contexts provided they are non-overlapping, that is, they // don't try to build the same projects (note that this is currently not @@ -142,9 +152,9 @@ namespace build2 // instead go the multiple communicating schedulers route, a la the job // server). // - // The loaded_modules state (module.hxx) is shared among all the contexts + // The module_libraries state (module.hxx) is shared among all the contexts // (there is no way to have multiple shared library loading "contexts") and - // is protected by loaded_modules_lock. A nested context should normally + // is protected by module_libraries_lock. A nested context should normally // inherit this lock value from its outer context. // // Note also that any given thread should not participate in multiple @@ -211,13 +221,15 @@ namespace build2 unique_ptr<data> data_; public: - scheduler& sched; - global_mutexes& mutexes; - file_cache& fcache; + // These are only NULL for the "bare minimum" context (see below). + // + scheduler* sched; + global_mutexes* mutexes; + file_cache* fcache; - // Match only flag (see --match-only but also dist). + // Match only flag/level (see --{load,match}-only but also dist). // - bool match_only; + optional<match_only_level> match_only; // Skip booting external modules flag (see --no-external-modules). // @@ -339,6 +351,22 @@ namespace build2 (current_mname.empty () && current_oname == mo)); }; + // Meta/operation-specific context-global auxiliary data storage. + // + // Note: cleared by current_[meta_]operation() below. Normally set by + // meta/operation-specific callbacks from [mate_]operation_info. + // + // Note also: watch out for MT-safety in the data itself. + // + static void + null_current_data_deleter (void* p) { assert (p == nullptr); } + + using current_data_ptr = unique_ptr<void, void (*) (void*)>; + + current_data_ptr current_mdata = {nullptr, null_current_data_deleter}; + current_data_ptr current_inner_odata = {nullptr, null_current_data_deleter}; + current_data_ptr current_outer_odata = {nullptr, null_current_data_deleter}; + // Current operation number (1-based) in the meta-operation batch. // size_t current_on; @@ -377,11 +405,14 @@ namespace build2 // decremented after such recipe has been executed. If such a recipe has // skipped executing the operation, then it should increment the skip // count. These two counters are used for progress monitoring and - // diagnostics. + // diagnostics. The resolve count keeps track of the number of targets + // matched but not executed as a result of the resolve_members() calls + // (see also target::resolve_counted). // atomic_count dependency_count; atomic_count target_count; atomic_count skip_count; + atomic_count resolve_count; // Build state (scopes, targets, variables, etc). // @@ -401,9 +432,15 @@ namespace build2 // struct posthoc_target { + struct prerequisite_target + { + const build2::target* target; + uint64_t match_options; + }; + build2::action action; reference_wrapper<const build2::target> target; - vector<const build2::target*> prerequisite_targets; + vector<prerequisite_target> prerequisite_targets; }; list<posthoc_target> current_posthoc_targets; @@ -630,9 +667,9 @@ namespace build2 dir_path old_src_root; dir_path new_src_root; - // NULL if this context hasn't already locked the loaded_modules state. + // NULL if this context hasn't already locked the module_libraries state. // - const loaded_modules_lock* modules_lock; + const module_libraries_lock* modules_lock; // Nested context for updating build system modules and ad hoc recipes. // @@ -649,6 +686,11 @@ namespace build2 // properly setup context (including, normally, a self-reference in // modules_context). // + // The var_override_function callback can be used to parse ad hoc project- + // wide variable overrides (see parse_variable_override()). This has to + // happen at a specific point during context construction (see the + // implementation for details). + // // Note: see also the trace_* data members that, if needed, must be set // separately, after construction. // @@ -661,11 +703,12 @@ namespace build2 reserves (size_t t, size_t v): targets (t), variables (v) {} }; - explicit + using var_override_function = void (context&, size_t&); + context (scheduler&, global_mutexes&, file_cache&, - bool match_only = false, + optional<match_only_level> match_only = nullopt, bool no_external_modules = false, bool dry_run = false, bool no_diag_buffer = false, @@ -673,7 +716,16 @@ namespace build2 const strings& cmd_vars = {}, reserves = {0, 160}, optional<context*> module_context = nullptr, - const loaded_modules_lock* inherited_mudules_lock = nullptr); + const module_libraries_lock* inherited_modules_lock = nullptr, + const function<var_override_function>& = nullptr); + + // Special context with bare minimum of initializations. It is only + // guaranteed to be sufficiently initialized to call extract_variable(). + // + // Note that for this purpose you may omit calls to init_diag() and + // init(). + // + context (); // Reserve elements in containers to avoid re-allocation/re-hashing. Zero // values are ignored (that is, the corresponding container reserve() @@ -682,12 +734,28 @@ namespace build2 void reserve (reserves); + // Parse a variable override returning its type in the first half of the + // pair. Index is the variable index (used to derive unique name) and if + // buildspec is true then assume `--` is used as a separator between + // variables and buildscpec and issue appropriate diagnostics. + // + // Note: should only be called from the var_override_function constructor + // callback. + // + pair<char, variable_override> + parse_variable_override (const string& var, size_t index, bool buildspec); + // Enter project-wide (as opposed to global) variable overrides. // + // If the amalgamation scope is specified, then use it instead of + // rs.weak_scope() to set overrides with global visibility (make sure you + // understand the implications before doing this). + // void enter_project_overrides (scope& rs, const dir_path& out_base, - const variable_overrides&); + const variable_overrides&, + scope* amalgamation = nullptr); // Set current meta-operation and operation. // @@ -781,14 +849,20 @@ namespace build2 // struct LIBBUILD2_SYMEXPORT phase_unlock { - phase_unlock (context&, bool unlock = true, bool delay = false); + explicit phase_unlock (context*, bool delay = false); + explicit phase_unlock (context& ctx, bool delay = false) + : phase_unlock (&ctx, delay) {} + ~phase_unlock () noexcept (false); void unlock (); + void + lock (); + context* ctx; - phase_lock* lock; + phase_lock* lock_; }; // Assuming we have a lock on the current phase, temporarily switch to a @@ -834,8 +908,8 @@ namespace build2 // Note: move-assignable to empty only. // - wait_guard (wait_guard&&); - wait_guard& operator= (wait_guard&&); + wait_guard (wait_guard&&) noexcept; + wait_guard& operator= (wait_guard&&) noexcept; wait_guard (const wait_guard&) = delete; wait_guard& operator= (const wait_guard&) = delete; |