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");

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