--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/utilities/ostream.hpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,241 @@
+/*
+ * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// Output streams for printing
+//
+// Printing guidelines:
+// Where possible, please use tty->print() and tty->print_cr().
+// For product mode VM warnings use warning() which internally uses tty.
+// In places where tty is not initialized yet or too much overhead,
+// we may use jio_printf:
+// jio_fprintf(defaultStream::output_stream(), "Message");
+// This allows for redirection via -XX:+DisplayVMOutputToStdout and
+// -XX:+DisplayVMOutputToStderr
+class outputStream : public ResourceObj {
+ protected:
+ int _indentation; // current indentation
+ int _width; // width of the page
+ int _position; // position on the current line
+ int _newlines; // number of '\n' output so far
+ julong _precount; // number of chars output, less _position
+ TimeStamp _stamp; // for time stamps
+
+ void update_position(const char* s, size_t len);
+ static const char* do_vsnprintf(char* buffer, size_t buflen,
+ const char* format, va_list ap,
+ bool add_cr,
+ size_t& result_len);
+
+ public:
+ // creation
+ outputStream(int width = 80);
+ outputStream(int width, bool has_time_stamps);
+
+ // indentation
+ void indent();
+ void inc() { _indentation++; };
+ void dec() { _indentation--; };
+ int indentation() const { return _indentation; }
+ void set_indentation(int i) { _indentation = i; }
+ void fill_to(int col);
+
+ // sizing
+ int width() const { return _width; }
+ int position() const { return _position; }
+ int newlines() const { return _newlines; }
+ julong count() const { return _precount + _position; }
+ void set_count(julong count) { _precount = count - _position; }
+ void set_position(int pos) { _position = pos; }
+
+ // printing
+ void print(const char* format, ...);
+ void print_cr(const char* format, ...);
+ void vprint(const char *format, va_list argptr);
+ void vprint_cr(const char* format, va_list argptr);
+ void print_raw(const char* str) { write(str, strlen(str)); }
+ void print_raw(const char* str, int len) { write(str, len); }
+ void print_raw_cr(const char* str) { write(str, strlen(str)); cr(); }
+ void print_raw_cr(const char* str, int len){ write(str, len); cr(); }
+ void put(char ch);
+ void sp();
+ void cr();
+ void bol() { if (_position > 0) cr(); }
+
+ // Time stamp
+ TimeStamp& time_stamp() { return _stamp; }
+ void stamp();
+ // Date stamp
+ void date_stamp(bool guard, const char* prefix, const char* suffix);
+ // A simplified call that includes a suffix of ": "
+ void date_stamp(bool guard) {
+ date_stamp(guard, "", ": ");
+ }
+
+ // portable printing of 64 bit integers
+ void print_jlong(jlong value);
+ void print_julong(julong value);
+
+ // flushing
+ virtual void flush() {}
+ virtual void write(const char* str, size_t len) = 0;
+ virtual ~outputStream() {} // close properly on deletion
+
+ void dec_cr() { dec(); cr(); }
+ void inc_cr() { inc(); cr(); }
+};
+
+// standard output
+ // ANSI C++ name collision
+extern outputStream* tty; // tty output
+extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty
+
+// advisory locking for the shared tty stream:
+class ttyLocker: StackObj {
+ private:
+ intx _holder;
+
+ public:
+ static intx hold_tty(); // returns a "holder" token
+ static void release_tty(intx holder); // must witness same token
+ static void break_tty_lock_for_safepoint(intx holder);
+
+ ttyLocker() { _holder = hold_tty(); }
+ ~ttyLocker() { release_tty(_holder); }
+};
+
+// for writing to strings; buffer will expand automatically
+class stringStream : public outputStream {
+ protected:
+ char* buffer;
+ size_t buffer_pos;
+ size_t buffer_length;
+ bool buffer_fixed;
+ public:
+ stringStream(size_t initial_bufsize = 256);
+ stringStream(char* fixed_buffer, size_t fixed_buffer_size);
+ ~stringStream();
+ virtual void write(const char* c, size_t len);
+ size_t size() { return buffer_pos; }
+ const char* base() { return buffer; }
+ void reset() { buffer_pos = 0; _precount = 0; _position = 0; }
+ char* as_string();
+};
+
+class fileStream : public outputStream {
+ protected:
+ FILE* _file;
+ bool _need_close;
+ public:
+ fileStream(const char* file_name);
+ fileStream(FILE* file) { _file = file; _need_close = false; }
+ ~fileStream();
+ bool is_open() const { return _file != NULL; }
+ virtual void write(const char* c, size_t len);
+ void flush();
+};
+
+// unlike fileStream, fdStream does unbuffered I/O by calling
+// open() and write() directly. It is async-safe, but output
+// from multiple thread may be mixed together. Used by fatal
+// error handler.
+class fdStream : public outputStream {
+ protected:
+ int _fd;
+ bool _need_close;
+ public:
+ fdStream(const char* file_name);
+ fdStream(int fd = -1) { _fd = fd; _need_close = false; }
+ ~fdStream();
+ bool is_open() const { return _fd != -1; }
+ void set_fd(int fd) { _fd = fd; _need_close = false; }
+ int fd() const { return _fd; }
+ virtual void write(const char* c, size_t len);
+ void flush() {};
+};
+
+void ostream_init();
+void ostream_init_log();
+void ostream_exit();
+void ostream_abort();
+
+// staticBufferStream uses a user-supplied buffer for all formatting.
+// Used for safe formatting during fatal error handling. Not MT safe.
+// Do not share the stream between multiple threads.
+class staticBufferStream : public outputStream {
+ private:
+ char* _buffer;
+ size_t _buflen;
+ outputStream* _outer_stream;
+ public:
+ staticBufferStream(char* buffer, size_t buflen,
+ outputStream *outer_stream);
+ ~staticBufferStream() {};
+ virtual void write(const char* c, size_t len);
+ void flush();
+ void print(const char* format, ...);
+ void print_cr(const char* format, ...);
+ void vprint(const char *format, va_list argptr);
+ void vprint_cr(const char* format, va_list argptr);
+};
+
+// In the non-fixed buffer case an underlying buffer will be created and
+// managed in C heap. Not MT-safe.
+class bufferedStream : public outputStream {
+ protected:
+ char* buffer;
+ size_t buffer_pos;
+ size_t buffer_length;
+ bool buffer_fixed;
+ public:
+ bufferedStream(size_t initial_bufsize = 256);
+ bufferedStream(char* fixed_buffer, size_t fixed_buffer_size);
+ ~bufferedStream();
+ virtual void write(const char* c, size_t len);
+ size_t size() { return buffer_pos; }
+ const char* base() { return buffer; }
+ void reset() { buffer_pos = 0; _precount = 0; _position = 0; }
+ char* as_string();
+};
+
+#define O_BUFLEN 2000 // max size of output of individual print() methods
+
+#ifndef PRODUCT
+
+class networkStream : public bufferedStream {
+
+ private:
+ int _socket;
+
+ public:
+ networkStream();
+ ~networkStream();
+
+ bool connect(const char *host, short port);
+ bool is_open() const { return _socket != -1; }
+ int read(char *buf, size_t len);
+ void close();
+ virtual void flush();
+};
+
+#endif