Reduce signal sender thread stack size to 32k.

src/utils.h

Index: src/utils.h
===================================================================
--- src/utils.h	(revision 10282)
+++ src/utils.h	(working copy)
@@ -157,7 +157,8 @@
 // number that is already a power of two, it is returned as is.
 // Implementation is from "Hacker's Delight" by Henry S. Warren, Jr.,
 // figure 3-3, page 48, where the function is called clp2.
-inline uint32_t RoundUpToPowerOf2(uint32_t x) {
+template<typename uint_type>
+inline uint_type RoundUpToPowerOf2(uint_type x) {
   ASSERT(x <= 0x80000000u);
   x = x - 1;
   x = x | (x >> 1);
@@ -169,6 +170,20 @@
 }
 
 
+template<typename int_type>
+inline int SignedRoundUpToPowerOf2(int_type x_argument) {
+  uintptr_t x = static_cast<uintptr_t>(x_argument);

[Vyacheslav Egorov (Chromium), 2011/12/21 13:22:12]

inline int SignedRoundUpToPowerOf2(int_type x_argument) {
  return static_cast<int>(RoundUpToPowerOf2(static_cast<uintptr_t>(x)));
}

+  ASSERT(x <= 0x80000000u);
+  x = x - 1;
+  x = x | (x >> 1);
+  x = x | (x >> 2);
+  x = x | (x >> 4);
+  x = x | (x >> 8);
+  x = x | (x >> 16);
+  return static_cast<int>(x + 1);
+}
+
+
 inline uint32_t RoundDownToPowerOf2(uint32_t x) {
   uint32_t rounded_up = RoundUpToPowerOf2(x);
   if (rounded_up > x) return rounded_up >> 1;