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

runtime/bin/fdutils_macos.cc

Index: runtime/bin/fdutils_macos.cc
diff --git a/runtime/bin/fdutils_macos.cc b/runtime/bin/fdutils_macos.cc
index bbc442df978660cff04bd2a55810cc5ff4ef3160..d225ad7fa2a0c30c6de7c3a67e9e291a73efb290 100644
--- a/runtime/bin/fdutils_macos.cc
+++ b/runtime/bin/fdutils_macos.cc
@@ -10,6 +10,7 @@
 #include <unistd.h>  // NOLINT
 #include <sys/ioctl.h>  // NOLINT
 
+#include "platform/signal_blocker.h"
 #include "bin/fdutils.h"
 
 
@@ -18,12 +19,12 @@ namespace bin {
 
 bool FDUtils::SetCloseOnExec(intptr_t fd) {
   intptr_t status;
-  status = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD));
+  status = fcntl(fd, F_GETFD);
   if (status < 0) {
     return false;
   }
   status |= FD_CLOEXEC;
-  if (TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, status)) < 0) {
+  if (fcntl(fd, F_SETFD, status) < 0) {
     return false;
   }
   return true;
@@ -32,12 +33,12 @@ bool FDUtils::SetCloseOnExec(intptr_t fd) {
 
 static bool SetBlockingHelper(intptr_t fd, bool blocking) {
   intptr_t status;
-  status = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFL));
+  status = fcntl(fd, F_GETFL);
   if (status < 0) {
     return false;
   }
   status = blocking ? (status & ~O_NONBLOCK) : (status | O_NONBLOCK);
-  if (TEMP_FAILURE_RETRY(fcntl(fd, F_SETFL, status)) < 0) {
+  if (fcntl(fd, F_SETFL, status) < 0) {
     return false;
   }
   return true;
@@ -56,7 +57,7 @@ bool FDUtils::SetBlocking(intptr_t fd) {
 
 bool FDUtils::IsBlocking(intptr_t fd, bool* is_blocking) {
   intptr_t status;
-  status = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFL));
+  status = fcntl(fd, F_GETFL);
   if (status < 0) {
     return false;
   }
@@ -67,7 +68,7 @@ bool FDUtils::IsBlocking(intptr_t fd, bool* is_blocking) {
 
 intptr_t FDUtils::AvailableBytes(intptr_t fd) {
   int available;  // ioctl for FIONREAD expects an 'int*' argument.
-  int result = TEMP_FAILURE_RETRY(ioctl(fd, FIONREAD, &available));
+  int result = ioctl(fd, FIONREAD, &available);
   if (result < 0) {
     return result;
   }