1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
42 protected:
43 int _indentation; // current indentation
44 int _width; // width of the page
45 int _position; // position on the current line
46 int _newlines; // number of '\n' output so far
47 julong _precount; // number of chars output, less _position
48 TimeStamp _stamp; // for time stamps
49
50 void update_position(const char* s, size_t len);
51 static const char* do_vsnprintf(char* buffer, size_t buflen,
52 const char* format, va_list ap,
53 bool add_cr,
54 size_t& result_len);
55
56 public:
57 // creation
58 outputStream(int width = 80);
59 outputStream(int width, bool has_time_stamps);
60
61 // indentation
62 void indent();
63 void inc() { _indentation++; };
64 void dec() { _indentation--; };
65 int indentation() const { return _indentation; }
66 void set_indentation(int i) { _indentation = i; }
67 void fill_to(int col);
68 void move_to(int col, int slop = 6, int min_space = 2);
69
70 // sizing
71 int width() const { return _width; }
72 int position() const { return _position; }
73 int newlines() const { return _newlines; }
74 julong count() const { return _precount + _position; }
75 void set_count(julong count) { _precount = count - _position; }
76 void set_position(int pos) { _position = pos; }
77
78 // printing
79 void print(const char* format, ...);
80 void print_cr(const char* format, ...);
81 void vprint(const char *format, va_list argptr);
82 void vprint_cr(const char* format, va_list argptr);
83 void print_raw(const char* str) { write(str, strlen(str)); }
84 void print_raw(const char* str, int len) { write(str, len); }
85 void print_raw_cr(const char* str) { write(str, strlen(str)); cr(); }
86 void print_raw_cr(const char* str, int len){ write(str, len); cr(); }
87 void put(char ch);
88 void sp(int count = 1);
89 void cr();
90 void bol() { if (_position > 0) cr(); }
91
92 // Time stamp
93 TimeStamp& time_stamp() { return _stamp; }
94 void stamp();
95 void stamp(bool guard, const char* prefix, const char* suffix);
96 void stamp(bool guard) {
97 stamp(guard, "", ": ");
98 }
99 // Date stamp
100 void date_stamp(bool guard, const char* prefix, const char* suffix);
101 // A simplified call that includes a suffix of ": "
102 void date_stamp(bool guard) {
103 date_stamp(guard, "", ": ");
104 }
105
106 // portable printing of 64 bit integers
107 void print_jlong(jlong value);
108 void print_julong(julong value);
109
110 // flushing
111 virtual void flush() {}
112 virtual void write(const char* str, size_t len) = 0;
113 virtual void rotate_log() {} // GC log rotation
114 virtual ~outputStream() {} // close properly on deletion
115
116 void dec_cr() { dec(); cr(); }
117 void inc_cr() { inc(); cr(); }
118 };
119
120 // standard output
121 // ANSI C++ name collision
122 extern outputStream* tty; // tty output
123 extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty
124
125 // advisory locking for the shared tty stream:
126 class ttyLocker: StackObj {
127 friend class ttyUnlocker;
128 private:
129 intx _holder;
130
131 public:
132 static intx hold_tty(); // returns a "holder" token
133 static void release_tty(intx holder); // must witness same token
134 static bool release_tty_if_locked(); // returns true if lock was released
135 static void break_tty_lock_for_safepoint(intx holder);
136
137 ttyLocker() { _holder = hold_tty(); }
138 ~ttyLocker() { release_tty(_holder); }
139 };
140
141 // Release the tty lock if it's held and reacquire it if it was
142 // locked. Used to avoid lock ordering problems.
143 class ttyUnlocker: StackObj {
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1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
42 protected:
43 int _indentation; // current indentation
44 int _width; // width of the page
45 int _position; // position on the current line
46 int _newlines; // number of '\n' output so far
47 julong _precount; // number of chars output, less _position
48 TimeStamp _stamp; // for time stamps
49
50 void update_position(const char* s, size_t len);
51 static const char* do_vsnprintf(char* buffer, size_t buflen,
52 const char* format, va_list ap,
53 bool add_cr,
54 size_t& result_len);
55
56 public:
57 // creation
58 outputStream(int width = 80);
59 outputStream(int width, bool has_time_stamps);
60
61 // indentation
62 outputStream& indent();
63 void inc() { _indentation++; };
64 void dec() { _indentation--; };
65 void inc(int n) { _indentation += n; };
66 void dec(int n) { _indentation -= n; };
67 int indentation() const { return _indentation; }
68 void set_indentation(int i) { _indentation = i; }
69 void fill_to(int col);
70 void move_to(int col, int slop = 6, int min_space = 2);
71
72 // sizing
73 int width() const { return _width; }
74 int position() const { return _position; }
75 int newlines() const { return _newlines; }
76 julong count() const { return _precount + _position; }
77 void set_count(julong count) { _precount = count - _position; }
78 void set_position(int pos) { _position = pos; }
79
80 // printing
81 void print(const char* format, ...);
82 void print_cr(const char* format, ...);
83 void vprint(const char *format, va_list argptr);
84 void vprint_cr(const char* format, va_list argptr);
85 void print_raw(const char* str) { write(str, strlen(str)); }
86 void print_raw(const char* str, int len) { write(str, len); }
87 void print_raw_cr(const char* str) { write(str, strlen(str)); cr(); }
88 void print_raw_cr(const char* str, int len){ write(str, len); cr(); }
89 void print_data(void* data, size_t len, bool with_ascii);
90 void put(char ch);
91 void sp(int count = 1);
92 void cr();
93 void bol() { if (_position > 0) cr(); }
94
95 // Time stamp
96 TimeStamp& time_stamp() { return _stamp; }
97 void stamp();
98 void stamp(bool guard, const char* prefix, const char* suffix);
99 void stamp(bool guard) {
100 stamp(guard, "", ": ");
101 }
102 // Date stamp
103 void date_stamp(bool guard, const char* prefix, const char* suffix);
104 // A simplified call that includes a suffix of ": "
105 void date_stamp(bool guard) {
106 date_stamp(guard, "", ": ");
107 }
108
109 // portable printing of 64 bit integers
110 void print_jlong(jlong value);
111 void print_julong(julong value);
112
113 // flushing
114 virtual void flush() {}
115 virtual void write(const char* str, size_t len) = 0;
116 virtual void rotate_log() {} // GC log rotation
117 virtual ~outputStream() {} // close properly on deletion
118
119 void dec_cr() { dec(); cr(); }
120 void inc_cr() { inc(); cr(); }
121 };
122
123 // standard output
124 // ANSI C++ name collision
125 extern outputStream* tty; // tty output
126 extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty
127
128 class streamIndentor : public StackObj {
129 private:
130 outputStream* _str;
131 int _amount;
132
133 public:
134 streamIndentor(outputStream* str, int amt = 2) : _str(str), _amount(amt) {
135 _str->inc(_amount);
136 }
137 ~streamIndentor() { _str->dec(_amount); }
138 };
139
140
141 // advisory locking for the shared tty stream:
142 class ttyLocker: StackObj {
143 friend class ttyUnlocker;
144 private:
145 intx _holder;
146
147 public:
148 static intx hold_tty(); // returns a "holder" token
149 static void release_tty(intx holder); // must witness same token
150 static bool release_tty_if_locked(); // returns true if lock was released
151 static void break_tty_lock_for_safepoint(intx holder);
152
153 ttyLocker() { _holder = hold_tty(); }
154 ~ttyLocker() { release_tty(_holder); }
155 };
156
157 // Release the tty lock if it's held and reacquire it if it was
158 // locked. Used to avoid lock ordering problems.
159 class ttyUnlocker: StackObj {
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