Move signal_blocker to platform and use it by default in TEMP_FAILURE_RETRY.

runtime/platform/globals.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
@@ skipping 454 matching lines @@
 
 
 // On Windows the reentrent version of strtok is called
 // strtok_s. Unify on the posix name strtok_r.
 #if defined(TARGET_OS_WINDOWS)
 #define snprintf _snprintf
 #define strtok_r strtok_s
 #endif
 
 #if !defined(TARGET_OS_WINDOWS)
-#if !defined(TEMP_FAILURE_RETRY)
-// TEMP_FAILURE_RETRY is defined in unistd.h on some platforms. The
-// definition below is copied from Linux and adapted to avoid lint
-// errors (type long int changed to intptr_t and do/while split on
-// separate lines with body in {}s).
-#define TEMP_FAILURE_RETRY(expression)                                         \
-    ({ intptr_t __result;                                                      \
-       do {                                                                    \
-         __result = (expression);                                              \
-       } while ((__result == -1L) && (errno == EINTR));                        \
-       __result; })
-#endif  // !defined(TEMP_FAILURE_RETRY)
-
-// This is a version of TEMP_FAILURE_RETRY which does not use the value
-// returned from the expression.
-#define VOID_TEMP_FAILURE_RETRY(expression)                                    \
-    (static_cast<void>(TEMP_FAILURE_RETRY(expression)))
-
+#if defined(TEMP_FAILURE_RETRY)
+// TEMP_FAILURE_RETRY is defined in unistd.h on some platforms. We should
+// not use that version, but instead the one in signal_blocker.h, to ensure
+// we disable signal interrupts.
+#undef TEMP_FAILURE_RETRY
+#endif  // defined(TEMP_FAILURE_RETRY)
 #endif  // !defined(TARGET_OS_WINDOWS)
 
 #if defined(TARGET_OS_LINUX) || defined(TARGET_OS_MACOS)
 // Tell the compiler to do printf format string checking if the
 // compiler supports it; see the 'format' attribute in
 // <http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Function-Attributes.html>.
 //
 // N.B.: As the GCC manual states, "[s]ince non-static C++ methods
 // have an implicit 'this' argument, the arguments of such methods
 // should be counted from two, not one."
 #define PRINTF_ATTRIBUTE(string_index, first_to_check) \
   __attribute__((__format__(__printf__, string_index, first_to_check)))
 #else
 #define PRINTF_ATTRIBUTE(string_index, first_to_check)
 #endif
 
 #endif  // PLATFORM_GLOBALS_H_