570     /**
571      * Returns two file descriptors for a pipe encoded in a long.
572      * The read end of the pipe is returned in the high 32 bits,
573      * while the write end is returned in the low 32 bits.
574      */
575     static native long makePipe(boolean blocking) throws IOException;
576 
577     static native int write1(int fd, byte b) throws IOException;
578 
579     /**
580      * Read and discard all bytes.
581      */
582     static native boolean drain(int fd) throws IOException;
583 
584     /**
585      * Read and discard at most one byte
586      * @return the number of bytes read or IOS_INTERRUPTED
587      */
588     static native int drain1(int fd) throws IOException;
589 
590     public static native void configureBlocking(FileDescriptor fd,
591                                                 boolean blocking)
592         throws IOException;
593 




594     public static native int fdVal(FileDescriptor fd);
595 
596     static native void setfdVal(FileDescriptor fd, int value);
597 
598     static native int fdLimit();
599 
600     static native int iovMax();
601 
602     static native long writevMax();
603 
604     static native void initIDs();
605 
606     /**
607      * Used to trigger loading of native libraries
608      */
609     public static void load() { }
610 
611     static {
612         jdk.internal.loader.BootLoader.loadLibrary("net");
613         jdk.internal.loader.BootLoader.loadLibrary("nio");

570     /**
571      * Returns two file descriptors for a pipe encoded in a long.
572      * The read end of the pipe is returned in the high 32 bits,
573      * while the write end is returned in the low 32 bits.
574      */
575     static native long makePipe(boolean blocking) throws IOException;
576 
577     static native int write1(int fd, byte b) throws IOException;
578 
579     /**
580      * Read and discard all bytes.
581      */
582     static native boolean drain(int fd) throws IOException;
583 
584     /**
585      * Read and discard at most one byte
586      * @return the number of bytes read or IOS_INTERRUPTED
587      */
588     static native int drain1(int fd) throws IOException;
589 
590     public static native void configureBlocking(FileDescriptor fd, boolean blocking)

591         throws IOException;
592 
593     public static void configureBlocking(int fd, boolean blocking) throws IOException {
594         configureBlocking(newFD(fd), blocking);
595     }
596 
597     public static native int fdVal(FileDescriptor fd);
598 
599     static native void setfdVal(FileDescriptor fd, int value);
600 
601     static native int fdLimit();
602 
603     static native int iovMax();
604 
605     static native long writevMax();
606 
607     static native void initIDs();
608 
609     /**
610      * Used to trigger loading of native libraries
611      */
612     public static void load() { }
613 
614     static {
615         jdk.internal.loader.BootLoader.loadLibrary("net");
616         jdk.internal.loader.BootLoader.loadLibrary("nio");