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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 11:19:16 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-07-24 09:53:24 +0000 |
commit | b5f8ee61a7f7e9bd291dd26b0585d03eb686c941 (patch) | |
tree | d4d31289c39fc00da064a825df13a0b98ce95b10 /ml/dlib/examples/logger_ex_2.cpp | |
parent | Adding upstream version 1.44.3. (diff) | |
download | netdata-b5f8ee61a7f7e9bd291dd26b0585d03eb686c941.tar.xz netdata-b5f8ee61a7f7e9bd291dd26b0585d03eb686c941.zip |
Adding upstream version 1.46.3.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | ml/dlib/examples/logger_ex_2.cpp | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/ml/dlib/examples/logger_ex_2.cpp b/ml/dlib/examples/logger_ex_2.cpp deleted file mode 100644 index 99332bffc..000000000 --- a/ml/dlib/examples/logger_ex_2.cpp +++ /dev/null @@ -1,153 +0,0 @@ -// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt - -/* - - This is a somewhat complex example illustrating the use of the logger object - from the dlib C++ Library. It will demonstrate using multiple loggers and threads. - - - The output of this program looks like this: - 0 INFO [0] example: This is an informational message. - 0 WARN [0] example: The variable is bigger than 4! Its value is 8 - 0 INFO [0] example: make two threads - 0 WARN [0] example.test_class: warning! someone called warning()! - 0 INFO [0] example: we are going to sleep for half a second. - 0 INFO [1] example.thread: entering our thread - 0 WARN [1] example.test_class: warning! someone called warning()! - 0 INFO [2] example.thread: entering our thread - 0 WARN [2] example.test_class: warning! someone called warning()! - 203 INFO [1] example.thread: exiting our thread - 203 INFO [2] example.thread: exiting our thread - 503 INFO [0] example: we just woke up - 503 INFO [0] example: program ending - - -*/ - - -#include <dlib/logger.h> -#include <dlib/misc_api.h> -#include <dlib/threads.h> - -using namespace dlib; - -/* - Here we create three loggers. Note that it is the case that: - - logp.is_child_of(logp) == true - - logt.is_child_of(logp) == true - - logc.is_child_of(logp) == true - - logp is the child of itself because all loggers are their own children :) But the other - two are child loggers of logp because their names start with logp.name() + "." which means - that whenever you set a property on a logger it will also set that same property on all of - the logger's children. -*/ -logger logp("example"); -logger logt("example.thread"); -logger logc("example.test_class"); - -class test -{ -public: - test () - { - // this message won't get logged because LINFO is too low - logc << LINFO << "constructed a test object"; - } - - ~test () - { - // this message won't get logged because LINFO is too low - logc << LINFO << "destructed a test object"; - } - - void warning () - { - logc << LWARN << "warning! someone called warning()!"; - } -}; - -void thread (void*) -{ - logt << LINFO << "entering our thread"; - - - test mytest; - mytest.warning(); - - dlib::sleep(200); - - logt << LINFO << "exiting our thread"; -} - - -void setup_loggers ( -) -{ - // Create a logger that has the same name as our root logger logp. This isn't very useful in - // this example program but if you had loggers defined in other files then you might not have - // easy access to them when starting up your program and setting log levels. This mechanism - // allows you to manipulate the properties of any logger so long as you know its name. - logger temp_log("example"); - - // For this example I don't want to log debug messages so I'm setting the logging level of - // All our loggers to LINFO. Note that this statement sets all three of our loggers to this - // logging level because they are all children of temp_log. - temp_log.set_level(LINFO); - - - // In addition I only want the example.test_class to print LWARN or higher messages so I'm going - // to set that here too. Note that we set this value after calling temp_log.set_level(). If we - // did it the other way around the set_level() call on temp_log would set logc_temp.level() and - // logc.level() back to LINFO since temp_log is a parent of logc_temp. - logger logc_temp("example.test_class"); - logc_temp.set_level(LWARN); - - - // Finally, note that you can also configure your loggers from a text config file. - // See the documentation for the configure_loggers_from_file() function for details. -} - -int main() -{ - setup_loggers(); - - // print our first message. It will go to cout because that is the default. - logp << LINFO << "This is an informational message."; - - int variable = 8; - - // Here is a debug message. It won't print though because its log level is too low (it is below LINFO). - logp << LDEBUG << "The integer variable is set to " << variable; - - - if (variable > 4) - logp << LWARN << "The variable is bigger than 4! Its value is " << variable; - - logp << LINFO << "make two threads"; - create_new_thread(thread,0); - create_new_thread(thread,0); - - test mytest; - mytest.warning(); - - logp << LINFO << "we are going to sleep for half a second."; - // sleep for half a second - dlib::sleep(500); - logp << LINFO << "we just woke up"; - - - - logp << LINFO << "program ending"; - - - // It is also worth pointing out that the logger messages are atomic. This means, for example, that - // in the above log statements that involve a string literal and a variable, no other thread can - // come in and print a log message in-between the literal string and the variable. This is good - // because it means your messages don't get corrupted. However, this also means that you shouldn't - // make any function calls inside a logging statement if those calls might try to log a message - // themselves since the atomic nature of the logger would cause your application to deadlock. -} - - - |