src/java.base/share/native/libjava/io_util.h

*** 27,36 ****
--- 27,37 ----
  #include "jni_util.h"
  
  extern jfieldID IO_fd_fdID;
  extern jfieldID IO_handle_fdID;
  extern jfieldID IO_append_fdID;
+ extern jfieldID IO_pgsz_fdID;
  
  #ifdef _ALLBSD_SOURCE
  #include <fcntl.h>
  #ifndef O_SYNC
  #define O_SYNC  O_FSYNC
*** 48,60 ****
--- 49,65 ----
   */
  
  jint readSingle(JNIEnv *env, jobject this, jfieldID fid);
  jint readBytes(JNIEnv *env, jobject this, jbyteArray bytes, jint off,
                 jint len, jfieldID fid);
+ jint readBytesD(JNIEnv *env, jobject this, jbyteArray bytes, jint off,
+                jint len, jfieldID fid, jfieldID pgsz_id);
  void writeSingle(JNIEnv *env, jobject this, jint byte, jboolean append, jfieldID fid);
  void writeBytes(JNIEnv *env, jobject this, jbyteArray bytes, jint off,
                  jint len, jboolean append, jfieldID fid);
+ void writeBytesD(JNIEnv *env, jobject this, jbyteArray bytes, jint off,
+                 jint len, jboolean append, jfieldID fid, jfieldID pgsz_id);
  void fileOpen(JNIEnv *env, jobject this, jstring path, jfieldID fid, int flags);
  void throwFileNotFoundException(JNIEnv *env, jstring path);
  
  /*
   * Macros for managing platform strings.  The typical usage pattern is:
*** 125,129 ****
--- 130,137 ----
  
  #define END_UNICODE_STRING(env, var)                                          \
          (*(env))->ReleaseStringChars(env, _##var##str, var);                  \
      _##var##end: ;                                                            \
      } else ((void)NULL)
+ 
+ #define GET_PG_SIZE(this, IO_pgsz_fdID) \
+         (*env)->GetIntField(env, (this), (IO_pgsz_fdID))