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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// ace
//
// = FILENAME
// Log_Msg.h
//
// = AUTHOR
// Doug Schmidt
//
// ============================================================================
#ifndef ACE_LOG_MSG_H
#define ACE_LOG_MSG_H
// This stuff must come first to avoid problems with circular
// headers...
// The following ASSERT macro is courtesy of Alexandre Karev
// <akg@na47sun05.cern.ch>.
#if defined (ACE_NDEBUG)
#define ACE_ASSERT(x)
#else
#define ACE_ASSERT(X) \
do { if(!(X)) { \
int __ace_error = ACE_OS::last_error (); \
ACE_Log_Msg *ace___ = ACE_Log_Msg::instance (); \
ace___->set (ASYS_TEXT (__FILE__), __LINE__, -1, __ace_error, ace___->restart (), \
ace___->msg_ostream (), ace___->msg_callback ()); \
ace___->log (LM_ERROR, ASYS_TEXT ("ACE_ASSERT: file %N, line %l assertion failed for '%s'.%a\n"), ASYS_WIDE_STRING (#X), -1); \
} } while (0)
#endif /* ACE_NDEBUG */
#if defined (ACE_NLOGGING)
#define ACE_HEX_DUMP(X) do {} while (0)
#define ACE_RETURN(Y) do { return (Y); } while (0)
#define ACE_ERROR_RETURN(X, Y) return (Y)
#define ACE_ERROR_BREAK(X) { break; }
#define ACE_ERROR(X) do {} while (0)
#define ACE_DEBUG(X) do {} while (0)
#define ACE_ERROR_INIT(VALUE, FLAGS)
#else
#define ACE_HEX_DUMP(X) \
do { \
int __ace_error = ACE_OS::last_error (); \
ACE_Log_Msg *ace___ = ACE_Log_Msg::instance (); \
ace___->set (ASYS_TEXT (__FILE__), __LINE__, 0, __ace_error, ace___->restart (), \
ace___->msg_ostream (), ace___->msg_callback ()); \
ace___->log_hexdump X; \
} while (0)
#define ACE_RETURN(Y) \
do { \
int __ace_error = ACE_OS::last_error (); \
ACE_Log_Msg::instance ()->set (ASYS_TEXT (__FILE__), __LINE__, Y, __ace_error); \
return Y; \
} while (0)
#define ACE_ERROR_RETURN(X, Y) \
do { \
int __ace_error = ACE_OS::last_error (); \
ACE_Log_Msg *ace___ = ACE_Log_Msg::instance (); \
ace___->set (ASYS_TEXT (__FILE__), __LINE__, Y, __ace_error, ace___->restart (), \
ace___->msg_ostream (), ace___->msg_callback ()); \
ace___->log X; \
return Y; \
} while (0)
#define ACE_ERROR(X) \
do { \
int __ace_error = ACE_OS::last_error (); \
ACE_Log_Msg *ace___ = ACE_Log_Msg::instance (); \
ace___->set (ASYS_TEXT (__FILE__), __LINE__, -1, __ace_error, ace___->restart (), \
ace___->msg_ostream (), ace___->msg_callback ()); \
ace___->log X; \
} while (0)
#define ACE_DEBUG(X) \
do { \
int __ace_error = ACE_OS::last_error (); \
ACE_Log_Msg *ace___ = ACE_Log_Msg::instance (); \
ace___->set (ASYS_TEXT (__FILE__), __LINE__, 0, __ace_error, ace___->restart (), \
ace___->msg_ostream (), ace___->msg_callback ()); \
ace___->log X; \
} while (0)
#define ACE_ERROR_INIT(VALUE, FLAGS) \
do { \
ACE_Log_Msg *ace___ = ACE_Log_Msg::instance (); \
ace___->set_flags (FLAGS); ace___->op_status (VALUE); \
} while (0)
#define ACE_ERROR_BREAK(X) { ACE_ERROR (X); break; }
#endif /* ACE_NLOGGING */
#include "ace/Log_Record.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#if defined (__Lynx__)
# undef STDERR
#endif /* __Lynx__ */
class ACE_Export ACE_Log_Msg_Callback
{
// = TITLE
// An interface class used for getting logging callbacks.
//
// = DESCRIPTION
// Users who are interested in getting the logging messages
// directly, can subclass this interface and override the log()
// method. They must then register their subclass with the
// Log_Msg class and make sure that they turn on the
// ACE_Log_Msg::MSG_CALLBACK flag.
//
// Your <log> routine is called with an instance of
// ACE_Log_Record. From this class, you can get the log
// message, the verbose log message, message type, message
// priority, and so on.
//
// Remember that there is one Log_Msg object per thread.
// Therefore, you may need to register your callback object with
// many <ACE_Log_Msg> objects (and have the correct
// synchronization in the <log> method) or have a separate
// callback object per Log_Msg object.
public:
virtual ~ACE_Log_Msg_Callback (void);
// No-op virtual destructor.
virtual void log (ACE_Log_Record &log_record) = 0;
// Callback routine. This is called when we want to log a message.
// Since this routine is pure virtual, it must be overwritten by the
// subclass.
};
#define ACE_LOG_MSG ACE_Log_Msg::instance ()
// Forward declaration
class ACE_Thread_Descriptor;
class ACE_Export ACE_Log_Msg
{
// = TITLE
// Provides a variable length argument message logging
// abstraction.
//
// = DESCRIPTION
// This class is very flexible since it allows formatted error
// messages to be printed in a thread-safe manner to stderr or a
// distributed logger. Moreover, the message is kept in a
// thread-specific storage location, which can be used to
// communicate errors between framework methods and callers.
public:
// Logger Flags.
enum
{
STDERR = 1,
// Write messages to stderr.
LOGGER = 2,
// Write messages to the local client logger deamon.
OSTREAM = 4,
// Write messages to the ostream * stored in thread-specific
// storage.
MSG_CALLBACK = 8,
// Write messages to the callback object.
VERBOSE = 16,
// Display messages in a verbose manner.
VERBOSE_LITE = 32,
// Display messages in a less verbose manner (i.e., only print
// information that can change between calls).
SILENT = 64
// Do not print messages at all (just leave in thread-specific
// storage for later inspection).
};
// = Initialization and termination routines.
static ACE_Log_Msg *instance (void);
// Returns a pointer to the Singleton.
static int exists (void);
// Returns non-null if an ACE_Log_Msg exists for the calling thread.
static void disable_debug_messages (ACE_Log_Priority priority = LM_DEBUG);
// Clears the flag from the default priority mask used to
// initialize ACE_Log_Msg instances.
static void enable_debug_messages (ACE_Log_Priority priority = LM_DEBUG);
// Sets the flag in the default priority mask used to initialize
// ACE_Log_Msg instances.
ACE_Log_Msg (void);
// Initialize logger.
~ACE_Log_Msg (void);
// cleanup logger.
int open (const ASYS_TCHAR *prog_name,
u_long options_flags = ACE_Log_Msg::STDERR,
LPCTSTR logger_key = 0);
// Initialize the ACE error handling facility. <prog_name> is the
// name of the executable program. <flags> are a bitwise-or of
// options flags passed to the Logger (see the enum above for the valid
// values). If the <LOGGER> bit in <flags> is enabled then
// <logger_key> is the name of ACE_FIFO rendezvous point where the
// local client logger daemon is listening for logging messages.
// = Set/get the options flags.
void set_flags (u_long f);
// Enable the bits in the logger's options flags.
void clr_flags (u_long f);
// Disable the bits in the logger's options flags.
u_long flags (void);
// Return the bits in the logger's options flags.
// = Allow apps to acquire and release internal synchronization lock.
// This lock is used internally by the <ACE_Log_Msg> implementation.
// By exporting the lock, applications can hold the lock atomically
// over a number of calls to <ACE_Log_Msg>.
int acquire (void);
// Acquire the internal lock.
int release (void);
// Release the internal lock.
void sync (const ASYS_TCHAR *program_name);
// Call after doing a <fork> to resynchronize the process id and
// <program_name> variables.
// @@ Does this function mean anything on Windows?
// = Set/get methods. Note that these are non-static and thus will
// be thread-specific.
void op_status (int status);
// Set the result of the operation status (by convention, -1 means
// error).
int op_status (void);
// Get the result of the operation status (by convention, -1 means
// error).
void errnum (int);
// Set the value of the errnum (by convention this corresponds to
// errno).
int errnum (void);
// Get the value of the errnum (by convention this corresponds to
// errno).
void linenum (int);
// Set the line number where an error occurred.
int linenum (void);
// Get the line number where an error occurred.
void file (const ASYS_TCHAR *);
// Set the file name where an error occurred.
const ASYS_TCHAR *file (void);
// Get the file name where an error occurred.
void msg (const ASYS_TCHAR *);
// Set the message that describes what type of error occurred.
const ASYS_TCHAR *msg (void);
// Get the message that describes what type of error occurred.
void restart (int);
// Set the field that indicates whether interrupted calls should be
// restarted.
int restart (void);
// Get the field that indicates whether interrupted calls should be
// restarted.
// = Notice that the following two function is equivalent to
// "void msg_ostream (HANDLE)" and "HANDLE msg_ostream (void)"
// on Windows CE. There is no <iostream.h> support on CE.
void msg_ostream (ACE_OSTREAM_TYPE *);
ACE_OSTREAM_TYPE *msg_ostream (void) const;
// Set/Get the ostream that is used to print error messages.
void msg_callback (ACE_Log_Msg_Callback *c);
ACE_Log_Msg_Callback *msg_callback (void) const;
// Set/Get the callback object.
// = Nesting depth increment and decrement.
int inc (void);
int dec (void);
// = Get/set trace depth.
int trace_depth (void);
void trace_depth (int);
// = Get/set trace active status.
int trace_active (void);
void trace_active (int value);
ACE_Thread_Descriptor *thr_desc (void) const;
// Get the TSS thread descriptor.
void thr_desc (ACE_Thread_Descriptor *td);
// Set the TSS thread descriptor. This method will call
// td->acquire_release to block execution until this call
// return.
#if defined (ACE_HAS_WIN32_STRUCTURAL_EXCEPTIONS)
ACE_SEH_EXCEPT_HANDLER seh_except_selector (void);
ACE_SEH_EXCEPT_HANDLER seh_except_selector (ACE_SEH_EXCEPT_HANDLER);
// Get/Set TSS exception action.
ACE_SEH_EXCEPT_HANDLER seh_except_handler (void);
ACE_SEH_EXCEPT_HANDLER seh_except_handler (ACE_SEH_EXCEPT_HANDLER);
// Get/Set TSS exception handler.
#endif /* ACE_HAS_WIN32_STRUCTURAL_EXCEPTIONS */
// = Stop/start/query tracing status on a per-thread basis...
void stop_tracing (void);
void start_tracing (void);
int tracing_enabled (void);
typedef enum
{
THREAD,
PROCESS
} MASK_TYPE;
// = Get/set the priority mask.
u_long priority_mask (MASK_TYPE = THREAD);
// Get the current <ACE_Log_Priority> mask.
u_long priority_mask (u_long, MASK_TYPE = THREAD);
// Set the <ACE_Log_Priority> mask, returns original mask.
int log_priority_enabled (ACE_Log_Priority log_priority);
// Return true if the requested priority is enabled.
pid_t getpid (void) const;
// Optimize reading of the pid (avoids a system call if the value is
// cached...).
// = Set/get the name of the local host.
const ASYS_TCHAR *local_host (void) const;
void local_host (const ASYS_TCHAR *);
void set (const ASYS_TCHAR *file,
int line,
int op_status = -1,
int errnum = 0,
int restart = 1,
ACE_OSTREAM_TYPE *os = 0,
ACE_Log_Msg_Callback *c = 0);
// Set the line number, file name, operational status, error number,
// restart flag, ostream, and the callback object. This combines
// all the other set methods into a single method.
ssize_t log (ACE_Log_Priority priority, const ASYS_TCHAR *format, ...);
// Format a message to the thread-safe ACE logging mechanism. Valid
// options (prefixed by '%', as in printf format strings) include:
// 'A': print an ACE_timer_t value (which could be either double or ACE_UINT32.)
// 'a': exit the program at this point (var-argument is the exit status!)
// 'c': print a character
// 'i', 'd': print a decimal number
// 'I', indent according to nesting depth
// 'e', 'E', 'f', 'F', 'g', 'G': print a double
// 'l', print line number where an error occurred.
// 'N': print file name where the error occurred.
// 'n': print the name of the program (or "<unknown>" if not set)
// 'o': print as an octal number
// 'P': print out the current process id
// 'p': print out the appropriate errno value from sys_errlist
// 'Q': print out the uint64 number
// 'r': call the function pointed to by the corresponding argument
// 'R': print return status
// 'S': print out the appropriate _sys_siglist entry corresponding to var-argument.
// 's': print out a character string
// 'T': print timestamp in hour:minute:sec:usec format.
// 'D': print timestamp in month/day/year hour:minute:sec:usec format.
// 't': print thread id (1 if single-threaded)
// 'u': print as unsigned int
// 'W': print out a wide (Unicode) character string (currently Win32 only).
// 'X', 'x': print as a hex number
// '%': print out a single percent sign, '%'
ssize_t log (const ASYS_TCHAR *format,
ACE_Log_Priority priority,
va_list argp);
// An alternative logging mechanism that makes it possible to
// integrate variable argument lists from other logging mechanisms
// into the ACE mechanism.
ssize_t log (ACE_Log_Record &log_record,
int suppress_stderr = 0);
// Log a custom built log record to the currently enabled logging
// sinks.
int log_hexdump (ACE_Log_Priority log_priority,
const char *buffer,
int size,
const ASYS_TCHAR *text = 0);
// Method to log hex dump. This is useful for debugging. Calls
// <log> to do the actual print, but formats first to make the chars
// printable.
void dump (void) const;
// Dump the state of an object.
ACE_ALLOC_HOOK_DECLARE;
// Declare the dynamic allocation hooks.
private:
int status_;
// Status of operation (-1 means failure, >= 0 means success).
int errnum_;
// Type of error that occurred (see <sys/errno.h>).
int linenum_;
// Line number where the error occurred.
ASYS_TCHAR file_[MAXPATHLEN + 1];
// File where the error occurred.
ASYS_TCHAR msg_[ACE_Log_Record::MAXLOGMSGLEN];
// The error message.
int restart_;
// Indicates whether we should restart system calls that are
// interrupted.
ACE_OSTREAM_TYPE *ostream_;
// The ostream where logging messages can be written.
ACE_Log_Msg_Callback *msg_callback_;
// The callback object.
int trace_depth_;
// Depth of the nesting for printing traces.
int trace_active_;
// Are we already within an ACE_Trace constructor call?
int tracing_enabled_;
// Are we allowing tracing in this thread?
ACE_Thread_Descriptor *thr_desc_;
// If we're running in the context of an <ACE_Thread_Manager> this
// will point to the thread descriptor adapter which holds the
// thread descriptor of the thread. This can be used to repidly
// access all thread data kept in <ACE_Thread_Descriptor>.
#if defined (ACE_HAS_WIN32_STRUCTURAL_EXCEPTIONS)
ACE_SEH_EXCEPT_HANDLER seh_except_selector_;
ACE_SEH_EXCEPT_HANDLER seh_except_handler_;
// These handlers determine how a thread handles win32 structured
// exception.
#endif /* ACE_HAS_WIN32_STRUCTURAL_EXCEPTIONS */
u_long priority_mask_;
// Keeps track of all the per-thread <ACE_Log_Priority> values that
// are currently enabled. Default is for all logging priorities to
// be enabled.
// = The following fields are *not* kept in thread-specific storage.
// We only want one instance for the entire process!
static u_long process_priority_mask_;
// Keeps track of all the per-process <ACE_Log_Priority> values that
// are currently enabled. Default is for all logging priorities to
// be enabled.
static const ASYS_TCHAR *program_name_;
// Records the program name.
static const ASYS_TCHAR *local_host_;
// Name of the local host (used when printing messages).
static pid_t pid_;
// Process id of the current process.
static u_long flags_;
// Options flags.
static int msg_off_;
// Offset of msg_[].
static int instance_count_;
// Number of existing Log_Msg instances; when 0, delete program/host
// names
static u_long default_priority_mask_;
// Priority mask to use for each new instance
#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
static int key_created_;
# if defined (ACE_HAS_THREAD_SPECIFIC_STORAGE) || \
defined (ACE_HAS_TSS_EMULATION)
static ACE_thread_key_t log_msg_tss_key_;
# endif /* ACE_HAS_THREAD_SPECIFIC_STORAGE || ACE_HAS_TSS_EMULATION */
#endif /* ACE_MT_SAFE */
static void close (void);
// For cleanup, at program termination.
friend void ACE_OS::cleanup_tss (const u_int);
// = Disallow these operations.
ACE_Log_Msg &operator= (const ACE_Log_Msg &);
ACE_Log_Msg (const ACE_Log_Msg &);
};
// #if defined (__ACE_INLINE__)
// #include "ace/Log_Msg.i"
// #endif /* __ACE_INLINE__ */
#endif /* ACE_LOG_MSG_H */
|