7003707: need to remove (some) system include files from the HotSpot header files

Summary: move socket_available into os_linux.cpp to avoid inclusion of ioctl.h in os_linux.inline.hpp
Reviewed-by: coleenp, stefank, ikrylov

src/os/linux/vm/os_linux.cpp

@@ -115,6 +115,7 @@
 # include <link.h>
 # include <stdint.h>
 # include <inttypes.h>
+# include <sys/ioctl.h>
 
 #define MAX_PATH    (2 * K)
 
@@ -4433,6 +4434,15 @@ int os::available(int fd, jlong *bytes) {
   return 1;
 }
 
+int os::socket_available(int fd, jint *pbytes) {
+  // Linux doc says EINTR not returned, unlike Solaris
+  int ret = ::ioctl(fd, FIONREAD, pbytes);
+
+  //%% note ioctl can return 0 when successful, JVM_SocketAvailable
+  // is expected to return 0 on failure and 1 on success to the jdk.
+  return (ret < 0) ? 0 : 1;
+}
+
 // Map a block of memory.
 char* os::map_memory(int fd, const char* file_name, size_t file_offset,
                      char *addr, size_t bytes, bool read_only,

src/os/linux/vm/os_linux.inline.hpp

@@ -45,7 +45,6 @@
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/poll.h>
-#include <sys/ioctl.h>
 #include <netdb.h>
 
 inline void* os::thread_local_storage_at(int index) {
@@ -268,16 +267,6 @@ inline int os::sendto(int fd, char *buf, int len, int flags,
   RESTARTABLE_RETURN_INT(::sendto(fd, buf, len, (unsigned int) flags, to, tolen));
 }
 
-inline int os::socket_available(int fd, jint *pbytes) {
-  // Linux doc says EINTR not returned, unlike Solaris
-  int ret = ::ioctl(fd, FIONREAD, pbytes);
-
-  //%% note ioctl can return 0 when successful, JVM_SocketAvailable
-  // is expected to return 0 on failure and 1 on success to the jdk.
-  return (ret < 0) ? 0 : 1;
-}
-
-
 inline int os::socket_shutdown(int fd, int howto){
   return ::shutdown(fd, howto);
 }