Delete bundled copy of NSS and replace with README.

nspr/pr/include/prtrace.h

Index: nspr/pr/include/prtrace.h
diff --git a/nspr/pr/include/prtrace.h b/nspr/pr/include/prtrace.h
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-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifndef prtrace_h___
-#define prtrace_h___
-/*
-** prtrace.h -- NSPR's Trace Facility.  		           
-**                                                               		           
-** The Trace Facility provides a means to trace application				           
-** program events within a process. When implementing an         		           
-** application program an engineer may insert a "Trace" function 		           
-** call, passing arguments to be traced. The "Trace" function     		           
-** combines the user trace data with identifying data and        		           
-** writes this data in time ordered sequence into a circular     		           
-** in-memory buffer; when the buffer fills, it wraps.
-**                                                               		           
-** Functions are provided to set and/or re-configure the size of		           
-** the trace buffer, control what events are recorded in the			           
-** buffer, enable and disable tracing based on specific user			           
-** supplied data and other control functions. Methods are provided		           
-** to record the trace entries in the in-memory trace buffer to
-** a file.
-**                                                               		           
-** Tracing may cause a performance degredation to the application		           
-** depending on the number and placement of calls to the tracing		           
-** facility. When tracing is compiled in and all tracing is				           
-** disabled via the runtime controls, the overhead should be			           
-** minimal. ... Famous last words, eh?									           
-** 																                   
-** When DEBUG is defined at compile time, the Trace Facility is                    
-** compiled as part of NSPR and any application using NSPR's                       
-** header files will have tracing compiled in. When DEBUG is not                   
-** defined, the Trace Facility is not compiled into NSPR nor                       
-** exported in its header files.  If the Trace Facility is                         
-** desired in a non-debug build, then FORCE_NSPR_TRACE may be                      
-** defined at compile time for both the optimized build of NSPR                    
-** and the application. NSPR and any application using  NSPR's                     
-** Trace Facility must be compiled with the same level of trace                    
-** conditioning or unresolved references may be realized at link                   
-** time.                                                                           
-**                                                                                 
-** For any of the Trace Facility methods that requires a trace                     
-** handle as an input argument, the caller must ensure that the                    
-** trace handle argument is valid. An invalid trace handle                         
-** argument may cause unpredictable results.                                       
-**                                                                                 
-** Trace Facility methods are thread-safe and SMP safe.                            
-**                                                                                 
-** Users of the Trace Facility should use the defined macros to                     
-** invoke trace methods, not the function calls directly. e.g.                      
-** PR_TRACE( h1,0,1,2, ...); not PR_Trace(h1,0,1,2, ...);
-**                                                                                  
-** Application designers should be aware of the effects of
-** debug and optimized build differences when using result of the
-** Trace Facility macros in expressions.
-** 
-** See Also: prcountr.h                                                                                 
-**                                                                                  
-** /lth. 08-Jun-1998.                                                                                  
-*/
-
-#include "prtypes.h"
-#include "prthread.h"
-#include "prtime.h"
-
-PR_BEGIN_EXTERN_C
-
-/*
-** Opaque type for the trace handle 
-** ... Don't even think about looking in here.
-**
-*/
-typedef void *  PRTraceHandle;
-
-/*
-** PRTraceEntry -- A trace entry in the in-memory trace buffer
-** looks like this.
-**
-*/
-typedef struct PRTraceEntry
-{
-    PRThread        *thread;        /* The thread creating the trace entry */
-    PRTraceHandle   handle;         /* PRTraceHandle creating the trace entry */
-    PRTime          time;           /* Value of PR_Now() at time of trace entry */
-    PRUint32        userData[8];    /* user supplied trace data */
-} PRTraceEntry;
-
-/*
-** PRTraceOption -- command operands to
-** PR_[Set|Get]TraceOption(). See descriptive meanings there.
-**
-*/
-typedef enum PRTraceOption
-{
-    PRTraceBufSize,
-    PRTraceEnable,              
-    PRTraceDisable,
-    PRTraceSuspend,
-    PRTraceResume,
-    PRTraceSuspendRecording,
-    PRTraceResumeRecording,
-    PRTraceLockHandles,
-    PRTraceUnLockHandles,
-    PRTraceStopRecording
-} PRTraceOption;
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_DEFINE_TRACE() -- Define a PRTraceHandle
-** 
-** DESCRIPTION: PR_DEFINE_TRACE() is used to define a trace
-** handle.
-** 
-*/
-#define PR_DEFINE_TRACE(name) PRTraceHandle name
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_INIT_TRACE_HANDLE() -- Set the value of a PRTraceHandle
-** 
-** DESCRIPTION: 
-** PR_INIT_TRACE_HANDLE() sets the value of a PRTraceHandle
-** to value. e.g. PR_INIT_TRACE_HANDLE( myHandle, NULL );
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_INIT_TRACE_HANDLE(handle,value)\
-    (handle) = (PRCounterHandle)(value)
-#else
-#define PR_INIT_TRACE_HANDLE(handle,value)
-#endif
-
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_CreateTrace() -- Create a trace handle
-** 
-** DESCRIPTION:
-**  PR_CreateTrace() creates a new trace handle. Tracing is
-**  enabled for this handle when it is created. The trace handle
-**  is intended for use in other Trace Facility calls.
-**  
-**  PR_CreateTrace() registers the QName, RName and description
-**  data so that this data can be retrieved later.
-** 
-** INPUTS: 
-**  qName: pointer to string. QName for this trace handle. 
-** 
-**  rName: pointer to string. RName for this trace handle. 
-** 
-**  description: pointer to string. Descriptive data about this
-**  trace handle.
-**
-** OUTPUTS:
-**  Creates the trace handle. 
-**  Registers the QName and RName with the trace facility.
-** 
-** RETURNS: 
-**  PRTraceHandle
-** 
-** RESTRICTIONS:
-**  qName is limited to 31 characters.
-**  rName is limited to 31 characters.
-**  description is limited to 255 characters.
-** 
-*/
-#define PRTRACE_NAME_MAX 31
-#define PRTRACE_DESC_MAX 255
-
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_CREATE_TRACE(handle,qName,rName,description)\
-    (handle) = PR_CreateTrace((qName),(rName),(description))
-#else
-#define PR_CREATE_TRACE(handle,qName,rName,description)
-#endif
-
-NSPR_API(PRTraceHandle)
-	PR_CreateTrace( 
-    	const char *qName,          /* QName for this trace handle */
-	    const char *rName,          /* RName for this trace handle */
-	    const char *description     /* description for this trace handle */
-);
-
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_DestroyTrace() -- Destroy a trace handle
-** 
-** DESCRIPTION: 
-**  PR_DestroyTrace() removes the referenced trace handle and
-** associated QName, RName and description data from the Trace
-** Facility.
-** 
-** INPUTS: handle. A PRTraceHandle
-** 
-** OUTPUTS: 
-**  The trace handle is unregistered.
-**  The QName, RName and description are removed.
-** 
-** RETURNS: void
-** 
-** RESTRICTIONS:
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_DESTROY_TRACE(handle)\
-    PR_DestroyTrace((handle))
-#else
-#define PR_DESTROY_TRACE(handle)
-#endif
-
-NSPR_API(void) 
-	PR_DestroyTrace( 
-		PRTraceHandle handle    /* Handle to be destroyed */
-);
-
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_Trace() -- Make a trace entry in the in-memory trace
-** 
-** DESCRIPTION:
-** PR_Trace() makes an entry in the in-memory trace buffer for
-** the referenced trace handle. The next logically available
-** PRTraceEntry is used; when the next trace entry would overflow
-** the trace table, the table wraps.
-**
-** PR_Trace() for a specific trace handle may be disabled by
-** calling PR_SetTraceOption() specifying PRTraceDisable for the
-** trace handle to be disabled.
-** 
-** INPUTS:
-** handle: PRTraceHandle. The trace handle for this trace.
-** 
-** userData[0..7]: unsigned 32bit integers. user supplied data
-** that is copied into the PRTraceEntry
-** 
-** OUTPUTS:
-**  A PRTraceEntry is (conditionally) formatted in the in-memory
-** trace buffer.
-** 
-** RETURNS: void.
-** 
-** RESTRICTIONS:
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_TRACE(handle,ud0,ud1,ud2,ud3,ud4,ud5,ud6,ud7)\
-    PR_Trace((handle),(ud0),(ud1),(ud2),(ud3),(ud4),(ud5),(ud6),(ud7))
-#else
-#define PR_TRACE(handle,ud0,ud1,ud2,ud3,ud4,ud5,ud6,ud7)
-#endif
-
-NSPR_API(void) 
-	PR_Trace( 
-    	PRTraceHandle handle,       /* use this trace handle */
-	    PRUint32    userData0,      /* User supplied data word 0 */
-	    PRUint32    userData1,      /* User supplied data word 1 */
-	    PRUint32    userData2,      /* User supplied data word 2 */
-	    PRUint32    userData3,      /* User supplied data word 3 */
-	    PRUint32    userData4,      /* User supplied data word 4 */
-	    PRUint32    userData5,      /* User supplied data word 5 */
-	    PRUint32    userData6,      /* User supplied data word 6 */
-	    PRUint32    userData7       /* User supplied data word 7 */
-);
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_SetTraceOption() -- Control the Trace Facility
-** 
-** DESCRIPTION:
-** PR_SetTraceOption() controls the Trace Facility. Depending on
-** command and value, attributes of the Trace Facility may be
-** changed.
-** 
-** INPUTS:
-**  command: An enumerated value in the set of PRTraceOption.
-**  value: pointer to the data to be set. Type of the data is
-**  dependent on command; for each value of command, the type
-**  and meaning of dereferenced value is shown.
-**
-**  PRTraceBufSize: unsigned long: the size of the trace buffer,
-** in bytes.
-** 
-**  PRTraceEnable: PRTraceHandle. The trace handle to be
-** enabled.
-** 
-**  PRTraceDisable: PRTraceHandle. The trace handle to be
-** disabled.
-** 
-**  PRTraceSuspend: void. value must be NULL. All tracing is
-** suspended.
-** 
-**  PRTraceResume: void. value must be NULL. Tracing for all
-** previously enabled, prior to a PRTraceSuspend, is resumed.
-** 
-**  PRTraceStopRecording: void. value must be NULL. If recording
-** (see: ** PR_RecordTraceEntries()) is being done, 
-** PRTraceStopRecording causes PR_RecordTraceEntries() to return
-** to its caller. If recording is not being done, this function
-** has no effect.
-** 
-**  PRTraceSuspendRecording: void. Must be NULL. If recording is
-** being done, PRTraceSuspendRecording causes further writes to
-** the trace file to be suspended. Data in the in-memory
-** trace buffer that would ordinarily be written to the
-** trace file will not be written. Trace entries will continue
-** to be entered in the in-memory buffer. If the Trace Facility
-** recording is already in a suspended state, the call has no
-** effect.
-** 
-**  PRTraceResumeRecording: void. value must be NULL. If
-** recording for the Trace Facility has been previously been
-** suspended, this causes recording to resume. Recording resumes
-** with the next in-memory buffer segment that would be written
-** if trace recording had not been suspended. If recording is
-** not currently suspended, the call has no effect.
-** 
-**  PRTraceLockHandles: void. value must be NULL. Locks the
-** trace handle lock. While the trace handle lock is held,
-** calls to PR_CreateTrace() will block until the lock is
-** released.
-** 
-**  PRTraceUnlockHandles: void. value must be NULL. Unlocks the
-** trace handle lock.
-** 
-** OUTPUTS:
-**  The operation of the Trace Facility may be changed.
-** 
-** RETURNS: void
-** 
-** RESTRICTIONS:
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_SET_TRACE_OPTION(command,value)\
-    PR_SetTraceOption((command),(value))
-#else
-#define PR_SET_TRACE_OPTION(command,value)
-#endif
-
-NSPR_API(void) 
-	PR_SetTraceOption( 
-	    PRTraceOption command,  /* One of the enumerated values */
-	    void *value             /* command value or NULL */
-);
-
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_GetTraceOption() -- Retrieve settings from the Trace Facility
-** 
-** DESCRIPTION:
-** PR_GetTraceOption() retrieves the current setting of the
-** Trace Facility control depending on command.
-** 
-** 
-**  PRTraceBufSize: unsigned long: the size of the trace buffer,
-** in bytes.
-** 
-** 
-** INPUTS:
-**  command: one of the enumerated values in PRTraceOptions
-** valid for PR_GetTraceOption().
-** 
-** OUTPUTS:
-**  dependent on command.
-** 
-** RETURNS: void
-** 
-** RESTRICTIONS:
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_GET_TRACE_OPTION(command,value)\
-    PR_GetTraceOption((command),(value))
-#else
-#define PR_GET_TRACE_OPTION(command,value)
-#endif
-
-NSPR_API(void) 
-	PR_GetTraceOption( 
-    	PRTraceOption command,  /* One of the enumerated values */
-	    void *value             /* command value or NULL */
-);
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_GetTraceHandleFromName() -- Retrieve an existing
-** handle by name.
-** 
-** DESCRIPTION:
-** PR_GetTraceHandleFromName() retreives an existing tracehandle
-** using the name specified by qName and rName.
-** 
-** INPUTS:
-**  qName: pointer to string. QName for this trace handle. 
-** 
-**  rName: pointer to string. RName for this trace handle. 
-** 
-** 
-** OUTPUTS: returned.
-** 
-** RETURNS: 
-**  PRTraceHandle associated with qName and rName or NULL when
-** there is no match.
-** 
-** RESTRICTIONS:
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_GET_TRACE_HANDLE_FROM_NAME(handle,qName,rName)\
-    (handle) = PR_GetTraceHandleFromName((qName),(rName))
-#else
-#define PR_GET_TRACE_HANDLE_FROM_NAME(handle,qName,rName)
-#endif
-
-NSPR_API(PRTraceHandle) 
-	PR_GetTraceHandleFromName( 
-    	const char *qName,      /* QName search argument */
-        const char *rName       /* RName search argument */
-);
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_GetTraceNameFromHandle() -- Retreive trace name
-** by bandle.
-** 
-** DESCRIPTION:
-** PR_GetTraceNameFromHandle() retreives the existing qName,
-** rName, and description for the referenced trace handle.
-** 
-** INPUTS: handle: PRTraceHandle.
-** 
-** OUTPUTS: pointers to the Trace Facility's copy of qName,
-** rName and description. ... Don't mess with these values.
-** They're mine.
-** 
-** RETURNS: void
-** 
-** RESTRICTIONS:
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_GET_TRACE_NAME_FROM_HANDLE(handle,qName,rName,description)\
-    PR_GetTraceNameFromHandle((handle),(qName),(rName),(description))
-#else
-#define PR_GET_TRACE_NAME_FROM_HANDLE(handle,qName,rName,description)
-#endif
-
-NSPR_API(void) 
-	PR_GetTraceNameFromHandle( 
-    	PRTraceHandle handle,       /* handle as search argument */
-	    const char **qName,         /* pointer to associated QName */
-	    const char **rName,         /* pointer to associated RName */
-    	const char **description    /* pointer to associated description */
-);
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_FindNextTraceQname() -- Retrieive a QName handle
-** iterator.
-** 
-** DESCRIPTION:
-** PR_FindNextTraceQname() retreives the first or next trace
-** QName handle, depending on the value of handle, from the trace
-** database. The PRTraceHandle returned can be used as an
-** iterator to traverse the QName handles in the Trace database.
-** 
-** INPUTS:
-**  handle: When NULL, PR_FindNextQname() returns the first QName
-** handle. When a handle is a valid PRTraceHandle previously
-** retreived using PR_FindNextQname() the next QName handle is
-** retreived.
-** 
-** OUTPUTS: returned.
-** 
-** RETURNS: 
-**  PRTraceHandle or NULL when there are no trace handles.
-** 
-** RESTRICTIONS:
-**  Iterating thru the trace handles via FindFirst/FindNext
-** should be done under protection of the trace handle lock.
-** See: PR_SetTraceOption( PRLockTraceHandles ).
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_FIND_NEXT_TRACE_QNAME(next,handle)\
-    (next) = PR_FindNextTraceQname((handle))
-#else
-#define PR_FIND_NEXT_TRACE_QNAME(next,handle)
-#endif
-
-NSPR_API(PRTraceHandle) 
-	PR_FindNextTraceQname( 
-        PRTraceHandle handle
-);
-
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_FindNextTraceRname() -- Retrieive an RName handle
-** iterator.
-** 
-** DESCRIPTION:
-** PR_FindNextTraceRname() retreives the first or next trace
-** RName handle, depending on the value of handle, from the trace
-** database. The PRTraceHandle returned can be used as an
-** iterator to traverse the RName handles in the Trace database.
-** 
-** INPUTS:
-**  rhandle: When NULL, PR_FindNextRname() returns the first
-** RName handle. When a handle is a valid PRTraceHandle
-** previously retreived using PR_FindNextRname() the next RName
-** handle is retreived.
-**  qhandle: A valid PRTraceHandle retruned from a previous call
-** to PR_FIND_NEXT_TRACE_QNAME().
-** 
-** OUTPUTS: returned.
-** 
-** RETURNS: 
-**  PRTraceHandle or NULL when there are no trace handles.
-** 
-** RESTRICTIONS:
-**  Iterating thru the trace handles via FindNext should be done
-** under protection of the trace handle lock. See: (
-** PR_SetTraceOption( PRLockTraceHandles ).
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_FIND_NEXT_TRACE_RNAME(next,rhandle,qhandle)\
-    (next) = PR_FindNextTraceRname((rhandle),(qhandle))
-#else
-#define PR_FIND_NEXT_TRACE_RNAME(next,rhandle,qhandle)
-#endif
-
-NSPR_API(PRTraceHandle) 
-	PR_FindNextTraceRname( 
-        PRTraceHandle rhandle,
-        PRTraceHandle qhandle
-);
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_RecordTraceEntries() -- Write trace entries to external media
-** 
-** DESCRIPTION:
-** PR_RecordTraceEntries() causes entries in the in-memory trace
-** buffer to be written to external media.
-**
-** When PR_RecordTraceEntries() is called from an application
-** thread, the function appears to block until another thread
-** calls PR_SetTraceOption() with the PRTraceStopRecording
-** option. This suggests that PR_RecordTraceEntries() should be
-** called from a user supplied thread whose only job is to
-** record trace entries. 
-** 
-** The environment variable NSPR_TRACE_LOG controls the operation
-** of this function. When NSPR_TRACE_LOG is not defined in the
-** environment, no recording of trace entries occurs. When
-** NSPR_TRACE_LOG is defined, the value of its definition must be
-** the filename of the file to receive the trace entry buffer.
-**
-** PR_RecordTraceEntries() attempts to record the in-memory
-** buffer to a file, subject to the setting of the environment
-** variable NSPR_TRACE_LOG. It is possible because of system
-** load, the thread priority of the recording thread, number of
-** active trace records being written over time, and other
-** variables that some trace records can be lost. ... In other
-** words: don't bet the farm on getting everything.
-** 
-** INPUTS: none
-** 
-** OUTPUTS: none
-** 
-** RETURNS: PR_STATUS
-**    PR_SUCCESS no errors were found.
-**    PR_FAILURE errors were found.
-** 
-** RESTRICTIONS:
-** Only one thread can call PR_RecordTraceEntries() within a
-** process.
-** 
-** On error, PR_RecordTraceEntries() may return prematurely.
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_RECORD_TRACE_ENTRIES()\
-	PR_RecordTraceEntries()
-#else
-#define PR_RECORD_TRACE_ENTRIES()
-#endif
-    
-NSPR_API(void)
-	PR_RecordTraceEntries(
-        void 
-);
-
-/* -----------------------------------------------------------------------
-** FUNCTION: PR_GetTraceEntries() -- Retreive trace entries from
-** the Trace Facility
-** 
-** DESCRIPTION:
-** PR_GetTraceEntries() retreives trace entries from the Trace
-** Facility. Up to count trace entries are copied from the Trace
-** Facility into buffer. Only those trace entries that have not
-** been copied via a previous call to PR_GetTraceEntries() are
-** copied. The actual number copied is placed in the PRInt32
-** variable pointed to by found.
-**
-** If more than count trace entries have entered the Trace
-** Facility since the last call to PR_GetTraceEntries() 
-** a lost data condition is returned. In this case, the most
-** recent count trace entries are copied into buffer and found is
-** set to count.
-** 
-** INPUTS:
-**  count. The number of trace entries to be copied into buffer.
-** 
-** 
-** OUTPUTS:
-**  buffer. An array of PRTraceEntries. The buffer is supplied
-** by the caller.
-** 
-** found: 32bit signed integer. The number of PRTraceEntries
-** actually copied. found is always less than or equal to count.
-** 
-** RETURNS: 
-**  zero when there is no lost data.
-**  non-zero when some PRTraceEntries have been lost.
-** 
-** RESTRICTIONS:
-** This is a real performance pig. The copy out operation is bad
-** enough, but depending on then frequency of calls to the
-** function, serious performance impact to the operating
-** application may be realized. ... YMMV.
-** 
-*/
-#if defined (DEBUG) || defined (FORCE_NSPR_TRACE)
-#define PR_GET_TRACE_ENTRIES(buffer,count,found)\
-        PR_GetTraceEntries((buffer),(count),(found))
-#else
-#define PR_GET_TRACE_ENTRIES(buffer,count,found)
-#endif
-
-NSPR_API(PRIntn)
-    PR_GetTraceEntries(
-        PRTraceEntry    *buffer,    /* where to write output */
-        PRInt32         count,      /* number to get */
-        PRInt32         *found      /* number you got */
-);
-
-PR_END_EXTERN_C
-
-#endif /* prtrace_h___ */
-