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 *
23 */
24
25 #include "precompiled.hpp"
26 #include "logging/log.hpp"
27 #include "logging/logStream.hpp"
28
29 LogStream::LineBuffer::LineBuffer()
30 : _buf(_smallbuf), _cap(sizeof(_smallbuf)), _pos(0)
31 {
32 _buf[0] = '\0';
33 }
34
35 LogStream::LineBuffer::~LineBuffer() {
36 assert(_pos == 0, "still outstanding bytes in the line buffer");
37 if (_buf != _smallbuf) {
38 os::free(_buf);
39 }
40 }
41
42 // try_ensure_cap tries to enlarge the capacity of the internal buffer
43 // to the given atleast value. May fail if either OOM happens or atleast
44 // is larger than a reasonable max of 1 M. Caller must not assume
45 // capacity without checking.
46 void LogStream::LineBuffer::try_ensure_cap(size_t atleast) {
47 assert(_cap >= sizeof(_smallbuf), "sanity");
87 // with what we have already; just truncate if necessary.
88 if (_cap < minimum_capacity_needed) {
89 len = _cap - _pos - 1;
90 if (len == 0) {
91 return;
92 }
93 }
94 memcpy(_buf + _pos, s, len);
95 _pos += len;
96 _buf[_pos] = '\0';
97 }
98
99 void LogStream::LineBuffer::reset() {
100 _pos = 0;
101 _buf[_pos] = '\0';
102 }
103
104 void LogStream::write(const char* s, size_t len) {
105 if (len > 0 && s[len - 1] == '\n') {
106 _current_line.append(s, len - 1); // omit the newline.
107 _log_handle.print("%s", _current_line.buffer());
108 _current_line.reset();
109 } else {
110 _current_line.append(s, len);
111 }
112 update_position(s, len);
113 }
114
115 // Destructor writes any unfinished output left in the line buffer.
116 LogStream::~LogStream() {
117 if (_current_line.is_empty() == false) {
118 _log_handle.print("%s", _current_line.buffer());
119 _current_line.reset();
120 }
121 }
122
123
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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 *
23 */
24
25 #include "precompiled.hpp"
26 #include "logging/log.hpp"
27 #include "logging/logStream.hpp"
28 #include "logging/logMessageBuffer.hpp"
29 #include "logging/logAsyncFlusher.hpp"
30
31 LogStream::LineBuffer::LineBuffer()
32 : _buf(_smallbuf), _cap(sizeof(_smallbuf)), _pos(0)
33 {
34 _buf[0] = '\0';
35 }
36
37 LogStream::LineBuffer::~LineBuffer() {
38 assert(_pos == 0, "still outstanding bytes in the line buffer");
39 if (_buf != _smallbuf) {
40 os::free(_buf);
41 }
42 }
43
44 // try_ensure_cap tries to enlarge the capacity of the internal buffer
45 // to the given atleast value. May fail if either OOM happens or atleast
46 // is larger than a reasonable max of 1 M. Caller must not assume
47 // capacity without checking.
48 void LogStream::LineBuffer::try_ensure_cap(size_t atleast) {
49 assert(_cap >= sizeof(_smallbuf), "sanity");
89 // with what we have already; just truncate if necessary.
90 if (_cap < minimum_capacity_needed) {
91 len = _cap - _pos - 1;
92 if (len == 0) {
93 return;
94 }
95 }
96 memcpy(_buf + _pos, s, len);
97 _pos += len;
98 _buf[_pos] = '\0';
99 }
100
101 void LogStream::LineBuffer::reset() {
102 _pos = 0;
103 _buf[_pos] = '\0';
104 }
105
106 void LogStream::write(const char* s, size_t len) {
107 if (len > 0 && s[len - 1] == '\n') {
108 _current_line.append(s, len - 1); // omit the newline.
109 if (!_async_log) {
110 _log_handle.print("%s", _current_line.buffer());
111 } else {
112 if (!_async_buffer) {
113 _async_buffer = new (mtLogging)LogMessageBuffer();
114 }
115 _async_buffer->write_n(_log_handle.level(), _current_line.buffer(), _current_line.size());
116 }
117 _current_line.reset();
118 } else {
119 _current_line.append(s, len);
120 }
121
122 update_position(s, len);
123 }
124
125 // Destructor writes any unfinished output left in the line buffer.
126 LogStream::~LogStream() {
127 if (!_current_line.is_empty()) {
128 if (!_async_log) {
129 _log_handle.print("%s", _current_line.buffer());
130 }
131 else {
132 if (!_async_buffer) {
133 _async_buffer = new (mtLogging)LogMessageBuffer();
134 }
135 _async_buffer->write_n(_log_handle.level(), _current_line.buffer(), _current_line.size());
136 }
137 _current_line.reset();
138 }
139
140 if (_async_log && _async_buffer) {
141 LogAsyncFlusher* flusher = LogAsyncFlusher::instance();
142 flusher->enqueue(_log_handle.tagset(), _async_buffer);
143 }
144 }
145
146 void LogStream::create_async_buffer() {
147 Arena* arena = new (mtLogging)Arena(mtLogging, LogMessageBuffer::initial_buffer_size());
148 _async_buffer = new (mtLogging)LogMessageBuffer(arena);
149 }
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