diff options
Diffstat (limited to 'deps/v8/src/heap/safepoint.h')
-rw-r--r-- | deps/v8/src/heap/safepoint.h | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/deps/v8/src/heap/safepoint.h b/deps/v8/src/heap/safepoint.h index 4b0036c047d..3ba96e11d59 100644 --- a/deps/v8/src/heap/safepoint.h +++ b/deps/v8/src/heap/safepoint.h @@ -7,6 +7,9 @@ #include "src/base/platform/condition-variable.h" #include "src/base/platform/mutex.h" +#include "src/handles/persistent-handles.h" +#include "src/heap/local-heap.h" +#include "src/objects/visitors.h" namespace v8 { namespace internal { @@ -15,9 +18,11 @@ class Heap; class LocalHeap; class RootVisitor; -class Safepoint { +// Used to bring all background threads with heap access to a safepoint such +// that e.g. a garbage collection can be performed. +class GlobalSafepoint { public: - explicit Safepoint(Heap* heap); + explicit GlobalSafepoint(Heap* heap); // Enter the safepoint from a thread void EnterFromThread(LocalHeap* local_heap); @@ -28,10 +33,22 @@ class Safepoint { // Iterate handles in local heaps void Iterate(RootVisitor* visitor); + // Iterate local heaps + template <typename Callback> + void IterateLocalHeaps(Callback callback) { + DCHECK(IsActive()); + for (LocalHeap* current = local_heaps_head_; current; + current = current->next_) { + callback(current); + } + } + // Use these methods now instead of the more intrusive SafepointScope void Start(); void End(); + bool IsActive() { return is_active_; } + private: class Barrier { base::Mutex mutex_; @@ -58,8 +75,11 @@ class Safepoint { base::Mutex local_heaps_mutex_; LocalHeap* local_heaps_head_; + bool is_active_; + friend class SafepointScope; friend class LocalHeap; + friend class PersistentHandles; }; class SafepointScope { @@ -68,7 +88,7 @@ class SafepointScope { V8_EXPORT_PRIVATE ~SafepointScope(); private: - Safepoint* safepoint_; + GlobalSafepoint* safepoint_; }; } // namespace internal |