Quelle nssbase.h
Sprache: C
/* 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 NSSBASE_H
#define NSSBASE_H
/*
* nssbase . h
*
* This header file contains the prototypes of the basic public
* NSS routines .
*/
#ifndef NSSBASET_H
#include "nssbaset.h"
#endif /* NSSBASET_H */
PR_BEGIN_EXTERN_C
/*
* NSSArena
*
* The public methods relating to this type are :
*
* NSSArena_Create - - constructor
* NSSArena_Destroy
* NSS_ZAlloc
* NSS_ZRealloc
* NSS_ZFreeIf
*/
/*
* NSSArena_Create
*
* This routine creates a new memory arena . This routine may return
* NULL upon error , in which case it will have created an error stack .
*
* The top - level error may be one of the following values :
* NSS_ERROR_NO_MEMORY
*
* Return value :
* NULL upon error
* A pointer to an NSSArena upon success
*/
NSS_EXTERN NSSArena *NSSArena_Create(
void );
extern const NSSError NSS_ERROR_NO_MEMORY;
/*
* NSSArena_Destroy
*
* This routine will destroy the specified arena , freeing all memory
* allocated from it . This routine returns a PRStatus value ; if
* successful , it will return PR_SUCCESS . If unsuccessful , it will
* create an error stack and return PR_FAILURE .
*
* The top - level error may be one of the following values :
* NSS_ERROR_INVALID_ARENA
*
* Return value :
* PR_SUCCESS upon success
* PR_FAILURE upon failure
*/
NSS_EXTERN PRStatus NSSArena_Destroy(NSSArena *arena);
extern const NSSError NSS_ERROR_INVALID_ARENA;
/*
* The error stack
*
* The public methods relating to the error stack are :
*
* NSS_GetError
* NSS_GetErrorStack
*/
/*
* NSS_GetError
*
* This routine returns the highest - level ( most general ) error set
* by the most recent NSS library routine called by the same thread
* calling this routine .
*
* This routine cannot fail . It may return NSS_ERROR_NO_ERROR , which
* indicates that the previous NSS library call did not set an error .
*
* Return value :
* 0 if no error has been set
* A nonzero error number
*/
NSS_EXTERN NSSError NSS_GetError(
void );
extern const NSSError NSS_ERROR_NO_ERROR;
/*
* NSS_GetErrorStack
*
* This routine returns a pointer to an array of NSSError values ,
* containingthe entire sequence or " stack " of errors set by the most
* recent NSS library routine called by the same thread calling this
* routine . NOTE : the caller DOES NOT OWN the memory pointed to by
* the return value . The pointer will remain valid until the calling
* thread calls another NSS routine . The lowest - level ( most specific )
* error is first in the array , and the highest - level is last . The
* array is zero - terminated . This routine may return NULL upon error ;
* this indicates a low - memory situation .
*
* Return value :
* NULL upon error , which is an implied NSS_ERROR_NO_MEMORY
* A NON - caller - owned pointer to an array of NSSError values
*/
NSS_EXTERN NSSError *NSS_GetErrorStack(
void );
/*
* NSS_ZNEW
*
* This preprocessor macro will allocate memory for a new object
* of the specified type with nss_ZAlloc , and will cast the
* return value appropriately . If the optional arena argument is
* non - null , the memory will be obtained from that arena ; otherwise ,
* the memory will be obtained from the heap . This routine may
* return NULL upon error , in which case it will have set an error
* upon the error stack .
*
* The error may be one of the following values :
* NSS_ERROR_INVALID_ARENA
* NSS_ERROR_NO_MEMORY
*
* Return value :
* NULL upon error
* A pointer to the new segment of zeroed memory
*/
#define NSS_ZNEW(arenaOpt, type) ((type *)NSS_ZAlloc((arenaOpt),
sizeof (type)))
/*
* NSS_ZNEWARRAY
*
* This preprocessor macro will allocate memory for an array of
* new objects , and will cast the return value appropriately .
* If the optional arena argument is non - null , the memory will
* be obtained from that arena ; otherwise , the memory will be
* obtained from the heap . This routine may return NULL upon
* error , in which case it will have set an error upon the error
* stack . The array size may be specified as zero .
*
* The error may be one of the following values :
* NSS_ERROR_INVALID_ARENA
* NSS_ERROR_NO_MEMORY
*
* Return value :
* NULL upon error
* A pointer to the new segment of zeroed memory
*/
#define NSS_ZNEWARRAY(arenaOpt, type, quantity) \
((type *)NSS_ZAlloc((arenaOpt),
sizeof (type) * (quantity)))
/*
* NSS_ZAlloc
*
* This routine allocates and zeroes a section of memory of the
* size , and returns to the caller a pointer to that memory . If
* the optional arena argument is non - null , the memory will be
* obtained from that arena ; otherwise , the memory will be obtained
* from the heap . This routine may return NULL upon error , in
* which case it will have set an error upon the error stack . The
* value specified for size may be zero ; in which case a valid
* zero - length block of memory will be allocated . This block may
* be expanded by calling NSS_ZRealloc .
*
* The error may be one of the following values :
* NSS_ERROR_INVALID_ARENA
* NSS_ERROR_NO_MEMORY
* NSS_ERROR_ARENA_MARKED_BY_ANOTHER_THREAD
*
* Return value :
* NULL upon error
* A pointer to the new segment of zeroed memory
*/
NSS_EXTERN
void *NSS_ZAlloc(NSSArena *arenaOpt, PRUint32 size);
/*
* NSS_ZRealloc
*
* This routine reallocates a block of memory obtained by calling
* nss_ZAlloc or nss_ZRealloc . The portion of memory
* between the new and old sizes - - which is either being newly
* obtained or released - - is in either case zeroed . This routine
* may return NULL upon failure , in which case it will have placed
* an error on the error stack .
*
* The error may be one of the following values :
* NSS_ERROR_INVALID_POINTER
* NSS_ERROR_NO_MEMORY
* NSS_ERROR_ARENA_MARKED_BY_ANOTHER_THREAD
*
* Return value :
* NULL upon error
* A pointer to the replacement segment of memory
*/
NSS_EXTERN
void *NSS_ZRealloc(
void *pointer, PRUint32 newSize);
/*
* NSS_ZFreeIf
*
* If the specified pointer is non - null , then the region of memory
* to which it points - - which must have been allocated with
* nss_ZAlloc - - will be zeroed and released . This routine
* returns a PRStatus value ; if successful , it will return PR_SUCCESS .
* If unsuccessful , it will set an error on the error stack and return
* PR_FAILURE .
*
* The error may be one of the following values :
* NSS_ERROR_INVALID_POINTER
*
* Return value :
* PR_SUCCESS
* PR_FAILURE
*/
NSS_EXTERN PRStatus NSS_ZFreeIf(
void *pointer);
PR_END_EXTERN_C
#endif /* NSSBASE_H */
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*© Formatika GbR, Deutschland
2026-10-10
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