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authorGravatar Vijay Pai <vpai@google.com>2018-03-01 11:48:29 -0800
committerGravatar Vijay Pai <vpai@google.com>2018-03-01 11:48:29 -0800
commitb357f2f548884e0f1766b5b1c3b12e1aa64642cc (patch)
tree84a5f405562ee887fe79fb36b8a7fe42773933c6 /src/core/lib/gpr
parent2fe87b09055cd256cdce038c4c70d92b955c991b (diff)
parentccd1d55807bdb13b661dcf1d651468b2d98ff5af (diff)
Merge branch 'master' into 2phase_thd
Diffstat (limited to 'src/core/lib/gpr')
-rw-r--r--src/core/lib/gpr/arena.cc45
1 files changed, 45 insertions, 0 deletions
diff --git a/src/core/lib/gpr/arena.cc b/src/core/lib/gpr/arena.cc
index 444bb3d719..b02c5b9fb6 100644
--- a/src/core/lib/gpr/arena.cc
+++ b/src/core/lib/gpr/arena.cc
@@ -26,6 +26,49 @@
#include <grpc/support/atm.h>
#include <grpc/support/log.h>
+// Uncomment this to use a simple arena that simply allocates the
+// requested amount of memory for each call to gpr_arena_alloc(). This
+// effectively eliminates the efficiency gain of using an arena, but it
+// may be useful for debugging purposes.
+//#define SIMPLE_ARENA_FOR_DEBUGGING
+
+#ifdef SIMPLE_ARENA_FOR_DEBUGGING
+
+#include <grpc/support/sync.h>
+
+struct gpr_arena {
+ gpr_mu mu;
+ void** ptrs;
+ size_t num_ptrs;
+};
+
+gpr_arena* gpr_arena_create(size_t ignored_initial_size) {
+ gpr_arena* arena = (gpr_arena*)gpr_zalloc(sizeof(*arena));
+ gpr_mu_init(&arena->mu);
+ return arena;
+}
+
+size_t gpr_arena_destroy(gpr_arena* arena) {
+ gpr_mu_destroy(&arena->mu);
+ for (size_t i = 0; i < arena->num_ptrs; ++i) {
+ gpr_free(arena->ptrs[i]);
+ }
+ gpr_free(arena->ptrs);
+ gpr_free(arena);
+ return 1; // Value doesn't matter, since it won't be used.
+}
+
+void* gpr_arena_alloc(gpr_arena* arena, size_t size) {
+ gpr_mu_lock(&arena->mu);
+ arena->ptrs =
+ (void**)gpr_realloc(arena->ptrs, sizeof(void*) * (arena->num_ptrs + 1));
+ void* retval = arena->ptrs[arena->num_ptrs++] = gpr_zalloc(size);
+ gpr_mu_unlock(&arena->mu);
+ return retval;
+}
+
+#else // SIMPLE_ARENA_FOR_DEBUGGING
+
// TODO(roth): We currently assume that all callers need alignment of 16
// bytes, which may be wrong in some cases. As part of converting the
// arena API to C++, we should consider replacing gpr_arena_alloc() with a
@@ -105,3 +148,5 @@ void* gpr_arena_alloc(gpr_arena* arena, size_t size) {
ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(zone));
return ptr + start - z->size_begin;
}
+
+#endif // SIMPLE_ARENA_FOR_DEBUGGING