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 *
23 */
24 #ifndef SHARE_LOGGING_LOGMESSAGEBUFFER_HPP
25 #define SHARE_LOGGING_LOGMESSAGEBUFFER_HPP
26
27 #include "logging/logDecorations.hpp"
28 #include "logging/logLevel.hpp"
29 #include "memory/allocation.hpp"
30
31 class LogMessageBuffer : public StackObj {
32 friend class LogMessageTest;
33 protected:
34 struct LogLine {
35 LogLevelType level;
36 size_t message_offset;
37 };
38 static const size_t InitialLineCapacity = 10;
39 static const size_t InitialMessageBufferCapacity = 1024;
40
41 size_t _message_buffer_size;
42 size_t _message_buffer_capacity;
43 char* _message_buffer;
44
45 size_t _line_count;
46 size_t _line_capacity;
47 LogLine* _lines;
48
49 bool _allocated;
50 LogLevelType _least_detailed_level;
51 size_t (*_prefix_fn)(char*, size_t);
52
53 void initialize_buffers();
54
55 private:
56 // Forbid copy assignment and copy constructor.
57 void operator=(const LogMessageBuffer& ref) {}
58 LogMessageBuffer(const LogMessageBuffer& ref) {}
59
60 public:
61 LogMessageBuffer();
62 ~LogMessageBuffer();
63
64 class Iterator {
65 private:
66 const LogMessageBuffer& _message;
67 size_t _current_line_index;
68 LogLevelType _level;
69 LogDecorations &_decorations;
70
71 void skip_messages_with_finer_level();
72
73 public:
74 Iterator(const LogMessageBuffer& message, LogLevelType level, LogDecorations& decorations)
75 : _message(message), _current_line_index(0), _level(level), _decorations(decorations) {
76 skip_messages_with_finer_level();
77 }
78
79 void operator++(int) {
80 _current_line_index++;
81 skip_messages_with_finer_level();
82 }
83
84 bool is_at_end() {
85 return _current_line_index == _message._line_count;
86 }
87
88 const char* message() const {
89 return _message._message_buffer + _message._lines[_current_line_index].message_offset;
90 }
91
92 const LogDecorations& decorations() {
93 _decorations.set_level(_message._lines[_current_line_index].level);
94 return _decorations;
95 }
96 };
97
98 void reset();
99
100 LogLevelType least_detailed_level() const {
101 return _least_detailed_level;
102 }
103
104 Iterator iterator(LogLevelType level, LogDecorations& decorations) const {
105 return Iterator(*this, level, decorations);
106 }
107
108 // Lines in LogMessageBuffers are not automatically prefixed based on tags
109 // like regular simple messages (see LogPrefix.hpp for more about prefixes).
110 // It is, however, possible to specify a prefix per LogMessageBuffer,
111 // using set_prefix(). Lines added to the LogMessageBuffer after a prefix
112 // function has been set will be prefixed automatically.
113 // Setting this to NULL will disable prefixing.
114 void set_prefix(size_t (*prefix_fn)(char*, size_t)) {
115 _prefix_fn = prefix_fn;
116 }
117
118 ATTRIBUTE_PRINTF(3, 4)
119 void write(LogLevelType level, const char* fmt, ...);
120
121 ATTRIBUTE_PRINTF(3, 0)
122 virtual void vwrite(LogLevelType level, const char* fmt, va_list args);
123
124 #define LOG_LEVEL(level, name) \
125 LogMessageBuffer& v##name(const char* fmt, va_list args) ATTRIBUTE_PRINTF(2, 0); \
126 LogMessageBuffer& name(const char* fmt, ...) ATTRIBUTE_PRINTF(2, 3);
127 LOG_LEVEL_LIST
128 #undef LOG_LEVEL
129 };
130
131 #endif // SHARE_LOGGING_LOGMESSAGEBUFFER_HPP
|
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 *
23 */
24 #ifndef SHARE_LOGGING_LOGMESSAGEBUFFER_HPP
25 #define SHARE_LOGGING_LOGMESSAGEBUFFER_HPP
26
27 #include "logging/logDecorations.hpp"
28 #include "logging/logLevel.hpp"
29 #include "memory/allocation.hpp"
30
31 class LogMessageBuffer : public CHeapObj<mtLogging> {
32 friend class LogMessageTest_nwrite_test_vm_Test;
33
34 protected:
35 struct LogLine {
36 LogLevelType level;
37 size_t message_offset;
38 };
39 static const size_t InitialLineCapacity = 10;
40 static const size_t InitialMessageBufferCapacity = 1024;
41
42 Arena* _arena;
43 size_t _message_buffer_size;
44 size_t _message_buffer_capacity;
45 char* _message_buffer;
46
47 size_t _line_count;
48 size_t _line_capacity;
49 LogLine* _lines;
50
51 bool _allocated;
52 LogLevelType _least_detailed_level;
53 size_t (*_prefix_fn)(char*, size_t);
54
55 void initialize_buffers();
56 template<typename T>
57 void grow(T*& buffer, size_t& capacity, size_t minimum_length = 0);
58
59 private:
60 NONCOPYABLE(LogMessageBuffer);
61
62 public:
63 LogMessageBuffer(Arena* arena = NULL);
64 ~LogMessageBuffer();
65
66 static size_t initial_buffer_size();
67
68 class Iterator {
69 private:
70 const LogMessageBuffer& _message;
71 size_t _current_line_index;
72 LogLevelType _level;
73 LogDecorations &_decorations;
74
75 void skip_messages_with_finer_level();
76
77 public:
78 Iterator(const LogMessageBuffer& message, LogLevelType level, LogDecorations& decorations)
79 : _message(message), _current_line_index(0), _level(level), _decorations(decorations) {
80 skip_messages_with_finer_level();
81 }
82
83 void operator++(int) {
84 _current_line_index++;
85 skip_messages_with_finer_level();
86 }
87
88 bool is_at_end() {
89 return _current_line_index == _message._line_count;
90 }
91
92 const char* message() const {
93 return _message._message_buffer + _message._lines[_current_line_index].message_offset;
94 }
95
96 const LogDecorations& decorations() {
97 _decorations.set_level(_message._lines[_current_line_index].level);
98 return _decorations;
99 }
100 };
101
102 void reset();
103
104 Arena* arena() const {
105 return _arena;
106 }
107
108 LogLevelType least_detailed_level() const {
109 return _least_detailed_level;
110 }
111
112 Iterator iterator(LogLevelType level, LogDecorations& decorations) const {
113 return Iterator(*this, level, decorations);
114 }
115
116 // Lines in LogMessageBuffers are not automatically prefixed based on tags
117 // like regular simple messages (see LogPrefix.hpp for more about prefixes).
118 // It is, however, possible to specify a prefix per LogMessageBuffer,
119 // using set_prefix(). Lines added to the LogMessageBuffer after a prefix
120 // function has been set will be prefixed automatically.
121 // Setting this to NULL will disable prefixing.
122 void set_prefix(size_t (*prefix_fn)(char*, size_t)) {
123 _prefix_fn = prefix_fn;
124 }
125
126 void write_n(LogLevelType level, const char * s, size_t written);
127
128 ATTRIBUTE_PRINTF(3, 4)
129 void write(LogLevelType level, const char* fmt, ...);
130
131 ATTRIBUTE_PRINTF(3, 0)
132 virtual void vwrite(LogLevelType level, const char* fmt, va_list args);
133
134 #define LOG_LEVEL(level, name) \
135 LogMessageBuffer& v##name(const char* fmt, va_list args) ATTRIBUTE_PRINTF(2, 0); \
136 LogMessageBuffer& name(const char* fmt, ...) ATTRIBUTE_PRINTF(2, 3);
137 LOG_LEVEL_LIST
138 #undef LOG_LEVEL
139 };
140
141 #endif // SHARE_LOGGING_LOGMESSAGEBUFFER_HPP
|