-#ifndef _TALLOC_H_
-#define _TALLOC_H_
+#ifndef CCAN_TALLOC_H
+#define CCAN_TALLOC_H
/*
- Unix SMB/CIFS implementation.
- Samba temporary memory allocation functions
-
Copyright (C) Andrew Tridgell 2004-2005
Copyright (C) Stefan Metzmacher 2006
#include <stdarg.h>
#include "config.h"
-/* this is only needed for compatibility with the old talloc */
-typedef void TALLOC_CTX;
-
/*
this uses a little trick to allow __LINE__ to be stringified
*/
#define __location__ __FILE__ ":" __TALLOC_STRING_LINE3__
#endif
-#ifndef TALLOC_DEPRECATED
-#define TALLOC_DEPRECATED 0
-#endif
-
-#ifndef PRINTF_ATTRIBUTE
-#if (__GNUC__ >= 3)
+#if HAVE_ATTRIBUTE_PRINTF
/** Use gcc attribute to check printf fns. a1 is the 1-based index of
* the parameter containing the format, and a2 the index of the first
* argument. Note that some gcc 2.x versions don't handle this
#else
#define PRINTF_ATTRIBUTE(a1, a2)
#endif
-#endif
/* try to make talloc_set_destructor() and talloc_steal() type safe,
if we have a recent gcc */
-#if (__GNUC__ >= 3)
+#if HAVE_TYPEOF
#define _TALLOC_TYPEOF(ptr) __typeof__(ptr)
+#else
+#define _TALLOC_TYPEOF(ptr) void *
+#endif
+
+#define talloc_move(ctx, ptr) (_TALLOC_TYPEOF(*(ptr)))_talloc_move((ctx),(void *)(ptr))
+
+/**
+ * talloc - allocate dynamic memory for a type
+ * @ctx: context to be parent of this allocation, or NULL.
+ * @type: the type to be allocated.
+ *
+ * The talloc() macro is the core of the talloc library. It takes a memory
+ * context and a type, and returns a pointer to a new area of memory of the
+ * given type.
+ *
+ * The returned pointer is itself a talloc context, so you can use it as the
+ * context argument to more calls to talloc if you wish.
+ *
+ * The returned pointer is a "child" of @ctx. This means that if you
+ * talloc_free() @ctx then the new child disappears as well. Alternatively you
+ * can free just the child.
+ *
+ * @ctx can be NULL, in which case a new top level context is created.
+ *
+ * Example:
+ * unsigned int *a, *b;
+ * a = talloc(NULL, unsigned int);
+ * b = talloc(a, unsigned int);
+ *
+ * See Also:
+ * talloc_zero, talloc_array, talloc_steal, talloc_free.
+ */
+#define talloc(ctx, type) (type *)talloc_named_const(ctx, sizeof(type), #type)
+
+/**
+ * talloc_free - free talloc'ed memory and its children
+ * @ptr: the talloced pointer to free
+ *
+ * The talloc_free() function frees a piece of talloc memory, and all its
+ * children. You can call talloc_free() on any pointer returned by talloc().
+ *
+ * The return value of talloc_free() indicates success or failure, with 0
+ * returned for success and -1 for failure. The only possible failure condition
+ * is if the pointer had a destructor attached to it and the destructor
+ * returned -1. See talloc_set_destructor() for details on destructors.
+ * errno will be preserved unless the talloc_free fails.
+ *
+ * If this pointer has an additional parent when talloc_free() is called then
+ * the memory is not actually released, but instead the most recently
+ * established parent is destroyed. See talloc_reference() for details on
+ * establishing additional parents.
+ *
+ * For more control on which parent is removed, see talloc_unlink().
+ *
+ * talloc_free() operates recursively on its children.
+ *
+ * Example:
+ * unsigned int *a, *b;
+ * a = talloc(NULL, unsigned int);
+ * b = talloc(a, unsigned int);
+ * // Frees a and b
+ * talloc_free(a);
+ *
+ * See Also:
+ * talloc_set_destructor, talloc_unlink
+ */
+int talloc_free(void *ptr);
+
+/**
+ * talloc_set_destructor: set a destructor for when this pointer is freed
+ * @ptr: the talloc pointer to set the destructor on
+ * @destructor: the function to be called
+ *
+ * The function talloc_set_destructor() sets the "destructor" for the pointer
+ * @ptr. A destructor is a function that is called when the memory used by a
+ * pointer is about to be released. The destructor receives the pointer as an
+ * argument, and should return 0 for success and -1 for failure.
+ *
+ * The destructor can do anything it wants to, including freeing other pieces
+ * of memory. A common use for destructors is to clean up operating system
+ * resources (such as open file descriptors) contained in the structure the
+ * destructor is placed on.
+ *
+ * You can only place one destructor on a pointer. If you need more than one
+ * destructor then you can create a zero-length child of the pointer and place
+ * an additional destructor on that.
+ *
+ * To remove a destructor call talloc_set_destructor() with NULL for the
+ * destructor.
+ *
+ * If your destructor attempts to talloc_free() the pointer that it is the
+ * destructor for then talloc_free() will return -1 and the free will be
+ * ignored. This would be a pointless operation anyway, as the destructor is
+ * only called when the memory is just about to go away.
+ *
+ * Example:
+ * static int destroy_fd(int *fd)
+ * {
+ * close(*fd);
+ * return 0;
+ * }
+ *
+ * int *open_file(const char *filename)
+ * {
+ * int *fd = talloc(NULL, int);
+ * *fd = open(filename, O_RDONLY);
+ * if (*fd < 0) {
+ * talloc_free(fd);
+ * return NULL;
+ * }
+ * // Whenever they free this, we close the file.
+ * talloc_set_destructor(fd, destroy_fd);
+ * return fd;
+ * }
+ *
+ * See Also:
+ * talloc, talloc_free
+ */
#define talloc_set_destructor(ptr, function) \
do { \
int (*_talloc_destructor_fn)(_TALLOC_TYPEOF(ptr)) = (function); \
_talloc_set_destructor((ptr), (int (*)(void *))_talloc_destructor_fn); \
} while(0)
-/* this extremely strange macro is to avoid some braindamaged warning
- stupidity in gcc 4.1.x */
-#define talloc_steal(ctx, ptr) ({ _TALLOC_TYPEOF(ptr) __talloc_steal_ret = (_TALLOC_TYPEOF(ptr))_talloc_steal((ctx),(ptr)); __talloc_steal_ret; })
+
+/**
+ * talloc_zero - allocate zeroed dynamic memory for a type
+ * @ctx: context to be parent of this allocation, or NULL.
+ * @type: the type to be allocated.
+ *
+ * The talloc_zero() macro is equivalent to:
+ *
+ * ptr = talloc(ctx, type);
+ * if (ptr) memset(ptr, 0, sizeof(type));
+ *
+ * Example:
+ * unsigned int *a, *b;
+ * a = talloc_zero(NULL, unsigned int);
+ * b = talloc_zero(a, unsigned int);
+ *
+ * See Also:
+ * talloc, talloc_zero_size, talloc_zero_array
+ */
+#define talloc_zero(ctx, type) (type *)_talloc_zero(ctx, sizeof(type), #type)
+
+/**
+ * talloc_array - allocate dynamic memory for an array of a given type
+ * @ctx: context to be parent of this allocation, or NULL.
+ * @type: the type to be allocated.
+ * @count: the number of elements to be allocated.
+ *
+ * The talloc_array() macro is a safe way of allocating an array. It is
+ * equivalent to:
+ *
+ * (type *)talloc_size(ctx, sizeof(type) * count);
+ *
+ * except that it provides integer overflow protection for the multiply,
+ * returning NULL if the multiply overflows.
+ *
+ * Example:
+ * unsigned int *a, *b;
+ * a = talloc_zero(NULL, unsigned int);
+ * b = talloc_array(a, unsigned int, 100);
+ *
+ * See Also:
+ * talloc, talloc_zero_array
+ */
+#define talloc_array(ctx, type, count) (type *)_talloc_array(ctx, sizeof(type), count, #type)
+
+/**
+ * talloc_size - allocate a particular size of memory
+ * @ctx: context to be parent of this allocation, or NULL.
+ * @size: the number of bytes to allocate
+ *
+ * The function talloc_size() should be used when you don't have a convenient
+ * type to pass to talloc(). Unlike talloc(), it is not type safe (as it
+ * returns a void *), so you are on your own for type checking.
+ *
+ * Best to use talloc() or talloc_array() instead.
+ *
+ * Example:
+ * void *mem = talloc_size(NULL, 100);
+ *
+ * See Also:
+ * talloc, talloc_array, talloc_zero_size
+ */
+#define talloc_size(ctx, size) talloc_named_const(ctx, size, __location__)
+
+#ifdef HAVE_TYPEOF
+/**
+ * talloc_steal - change/set the parent context of a talloc pointer
+ * @ctx: the new parent
+ * @ptr: the talloc pointer to reparent
+ *
+ * The talloc_steal() function changes the parent context of a talloc
+ * pointer. It is typically used when the context that the pointer is currently
+ * a child of is going to be freed and you wish to keep the memory for a longer
+ * time.
+ *
+ * The talloc_steal() function returns the pointer that you pass it. It does
+ * not have any failure modes.
+ *
+ * NOTE: It is possible to produce loops in the parent/child relationship if
+ * you are not careful with talloc_steal(). No guarantees are provided as to
+ * your sanity or the safety of your data if you do this.
+ *
+ * talloc_steal (new_ctx, NULL) will return NULL with no sideeffects.
+ *
+ * Example:
+ * unsigned int *a, *b;
+ * a = talloc(NULL, unsigned int);
+ * b = talloc(NULL, unsigned int);
+ * // Reparent b to a as if we'd done 'b = talloc(a, unsigned int)'.
+ * talloc_steal(a, b);
+ *
+ * See Also:
+ * talloc_reference
+ */
+#define talloc_steal(ctx, ptr) ({ _TALLOC_TYPEOF(ptr) _talloc_steal_ret = (_TALLOC_TYPEOF(ptr))_talloc_steal((ctx),(ptr)); _talloc_steal_ret; }) /* this extremely strange macro is to avoid some braindamaged warning stupidity in gcc 4.1.x */
#else
-#define talloc_set_destructor(ptr, function) \
- _talloc_set_destructor((ptr), (int (*)(void *))(function))
-#define _TALLOC_TYPEOF(ptr) void *
#define talloc_steal(ctx, ptr) (_TALLOC_TYPEOF(ptr))_talloc_steal((ctx),(ptr))
-#endif
+#endif /* HAVE_TYPEOF */
+
+/**
+ * talloc_report_full - report all the memory used by a pointer and children.
+ * @ptr: the context to report on
+ * @f: the file to report to
+ *
+ * Recursively print the entire tree of memory referenced by the
+ * pointer. References in the tree are shown by giving the name of the pointer
+ * that is referenced.
+ *
+ * You can pass NULL for the pointer, in which case a report is printed for the
+ * top level memory context, but only if talloc_enable_null_tracking() has been
+ * called.
+ *
+ * Example:
+ * unsigned int *a, *b;
+ * a = talloc(NULL, unsigned int);
+ * b = talloc(a, unsigned int);
+ * fprintf(stderr, "Dumping memory tree for a:\n");
+ * talloc_report_full(a, stderr);
+ *
+ * See Also:
+ * talloc_report
+ */
+void talloc_report_full(const void *ptr, FILE *f);
+/**
+ * talloc_reference - add an additional parent to a context
+ * @ctx: the additional parent
+ * @ptr: the talloc pointer
+ *
+ * The talloc_reference() function makes @ctx an additional parent of @ptr.
+ *
+ * The return value of talloc_reference() is always the original pointer @ptr,
+ * unless talloc ran out of memory in creating the reference in which case it
+ * will return NULL (each additional reference consumes around 48 bytes of
+ * memory on intel x86 platforms).
+ *
+ * If @ptr is NULL, then the function is a no-op, and simply returns NULL.
+ *
+ * After creating a reference you can free it in one of the following ways:
+ *
+ * - you can talloc_free() any parent of the original pointer. That will
+ * reduce the number of parents of this pointer by 1, and will cause this
+ * pointer to be freed if it runs out of parents.
+ *
+ * - you can talloc_free() the pointer itself. That will destroy the most
+ * recently established parent to the pointer and leave the pointer as a
+ * child of its current parent.
+ *
+ * For more control on which parent to remove, see talloc_unlink().
+ * Example:
+ * unsigned int *a, *b, *c;
+ * a = talloc(NULL, unsigned int);
+ * b = talloc(NULL, unsigned int);
+ * c = talloc(a, unsigned int);
+ * // b also serves as a parent of c.
+ * talloc_reference(b, c);
+ */
#define talloc_reference(ctx, ptr) (_TALLOC_TYPEOF(ptr))_talloc_reference((ctx),(ptr))
-#define talloc_move(ctx, ptr) (_TALLOC_TYPEOF(*(ptr)))_talloc_move((ctx),(void *)(ptr))
-/* useful macros for creating type checked pointers */
-#define talloc(ctx, type) (type *)talloc_named_const(ctx, sizeof(type), #type)
-#define talloc_size(ctx, size) talloc_named_const(ctx, size, __location__)
+/**
+ * talloc_unlink: remove a specific parent from a talloc pointer.
+ * @context: the parent to remove
+ * @ptr: the talloc pointer
+ *
+ * The talloc_unlink() function removes a specific parent from @ptr. The
+ * context passed must either be a context used in talloc_reference() with this
+ * pointer, or must be a direct parent of @ptr.
+ *
+ * Note that if the parent has already been removed using talloc_free() then
+ * this function will fail and will return -1. Likewise, if @ptr is NULL,
+ * then the function will make no modifications and return -1.
+ *
+ * Usually you can just use talloc_free() instead of talloc_unlink(), but
+ * sometimes it is useful to have the additional control on which parent is
+ * removed.
+ * Example:
+ * unsigned int *a, *b, *c;
+ * a = talloc(NULL, unsigned int);
+ * b = talloc(NULL, unsigned int);
+ * c = talloc(a, unsigned int);
+ * // b also serves as a parent of c.
+ * talloc_reference(b, c);
+ * talloc_unlink(b, c);
+ */
+int talloc_unlink(const void *context, void *ptr);
+
+/**
+ * talloc_report - print a summary of memory used by a pointer
+ *
+ * The talloc_report() function prints a summary report of all memory
+ * used by @ptr. One line of report is printed for each immediate child of
+ * @ptr, showing the total memory and number of blocks used by that child.
+ *
+ * You can pass NULL for the pointer, in which case a report is printed for the
+ * top level memory context, but only if talloc_enable_null_tracking() has been
+ * called.
+ *
+ * Example:
+ * unsigned int *a, *b;
+ * a = talloc(NULL, unsigned int);
+ * b = talloc(a, unsigned int);
+ * fprintf(stderr, "Summary of memory tree for a:\n");
+ * talloc_report(a, stderr);
+ *
+ * See Also:
+ * talloc_report_full
+ */
+void talloc_report(const void *ptr, FILE *f);
+
+/**
+ * talloc_ptrtype - allocate a size of memory suitable for this pointer
+ * @ctx: context to be parent of this allocation, or NULL.
+ * @ptr: the pointer whose type we are to allocate
+ *
+ * The talloc_ptrtype() macro should be used when you have a pointer and
+ * want to allocate memory to point at with this pointer. When compiling
+ * with gcc >= 3 it is typesafe. Note this is a wrapper of talloc_size()
+ * and talloc_get_name() will return the current location in the source file.
+ * and not the type.
+ *
+ * Example:
+ * unsigned int *a = talloc_ptrtype(NULL, a);
+ */
#define talloc_ptrtype(ctx, ptr) (_TALLOC_TYPEOF(ptr))talloc_size(ctx, sizeof(*(ptr)))
+/**
+ * talloc_free_children - free talloc'ed memory's children only
+ * @ptr: the talloced pointer whose children we want to free
+ *
+ * talloc_free_children() walks along the list of all children of a talloc
+ * context @ptr and talloc_free()s only the children, not the context itself.
+ * Example:
+ * unsigned int *a, *b;
+ * a = talloc(NULL, unsigned int);
+ * b = talloc(a, unsigned int);
+ * // Frees b
+ * talloc_free_children(a);
+ */
+void talloc_free_children(void *ptr);
+
+/**
+ * talloc_new - create a new context
+ * @ctx: the context to use as a parent.
+ *
+ * This is a utility macro that creates a new memory context hanging off an
+ * exiting context, automatically naming it "talloc_new: __location__" where
+ * __location__ is the source line it is called from. It is particularly useful
+ * for creating a new temporary working context.
+ */
#define talloc_new(ctx) talloc_named_const(ctx, 0, "talloc_new: " __location__)
-#define talloc_zero(ctx, type) (type *)_talloc_zero(ctx, sizeof(type), #type)
+/**
+ * talloc_zero_size - allocate a particular size of zeroed memory
+ *
+ * The talloc_zero_size() function is useful when you don't have a known type.
+ */
#define talloc_zero_size(ctx, size) _talloc_zero(ctx, size, __location__)
+/**
+ * talloc_zero_array - allocate an array of zeroed types
+ * @ctx: context to be parent of this allocation, or NULL.
+ * @type: the type to be allocated.
+ * @count: the number of elements to be allocated.
+ *
+ * Just like talloc_array, but zeroes the memory.
+ */
#define talloc_zero_array(ctx, type, count) (type *)_talloc_zero_array(ctx, sizeof(type), count, #type)
-#define talloc_array(ctx, type, count) (type *)_talloc_array(ctx, sizeof(type), count, #type)
+
+/**
+ * talloc_zero_array - allocate an array of zeroed types
+ * @ctx: context to be parent of this allocation, or NULL.
+ * @type: the type to be allocated.
+ * @count: the number of elements to be allocated.
+ *
+ * Just like talloc_array, but zeroes the memory.
+ */
#define talloc_array_size(ctx, size, count) _talloc_array(ctx, size, count, __location__)
+
+/**
+ * talloc_array_ptrtype - allocate an array of memory suitable for this pointer
+ * @ctx: context to be parent of this allocation, or NULL.
+ * @ptr: the pointer whose type we are to allocate
+ * @count: the number of elements for the array
+ *
+ * Like talloc_ptrtype(), except it allocates an array.
+ */
#define talloc_array_ptrtype(ctx, ptr, count) (_TALLOC_TYPEOF(ptr))talloc_array_size(ctx, sizeof(*(ptr)), count)
+/**
+ * talloc_realloc - resize a talloc array
+ * @ctx: the parent to assign (if p is NULL)
+ * @p: the memory to reallocate
+ * @type: the type of the object to allocate
+ * @count: the number of objects to reallocate
+ *
+ * The talloc_realloc() macro changes the size of a talloc pointer. The "count"
+ * argument is the number of elements of type "type" that you want the
+ * resulting pointer to hold.
+ *
+ * talloc_realloc() has the following equivalences:
+ *
+ * talloc_realloc(context, NULL, type, 1) ==> talloc(context, type);
+ * talloc_realloc(context, NULL, type, N) ==> talloc_array(context, type, N);
+ * talloc_realloc(context, ptr, type, 0) ==> talloc_free(ptr);
+ *
+ * The "context" argument is only used if "ptr" is NULL, otherwise it is
+ * ignored.
+ *
+ * talloc_realloc() returns the new pointer, or NULL on failure. The call will
+ * fail either due to a lack of memory, or because the pointer has more than
+ * one parent (see talloc_reference()).
+ */
#define talloc_realloc(ctx, p, type, count) (type *)_talloc_realloc_array(ctx, p, sizeof(type), count, #type)
+
+/**
+ * talloc_realloc_size - resize talloc memory
+ * @ctx: the parent to assign (if p is NULL)
+ * @ptr: the memory to reallocate
+ * @size: the new size of memory.
+ *
+ * The talloc_realloc_size() function is useful when the type is not known so
+ * the typesafe talloc_realloc() cannot be used.
+ */
#define talloc_realloc_size(ctx, ptr, size) _talloc_realloc(ctx, ptr, size, __location__)
+/**
+ * talloc_strdup - duplicate a string
+ * @ctx: the talloc context for the new string
+ * @p: the string to copy
+ *
+ * The talloc_strdup() function is equivalent to:
+ *
+ * ptr = talloc_size(ctx, strlen(p)+1);
+ * if (ptr) memcpy(ptr, p, strlen(p)+1);
+ *
+ * This functions sets the name of the new pointer to the passed string. This
+ * is equivalent to:
+ *
+ * talloc_set_name_const(ptr, ptr)
+ */
+char *talloc_strdup(const void *t, const char *p);
+
+/**
+ * talloc_strndup - duplicate a limited length of a string
+ * @ctx: the talloc context for the new string
+ * @p: the string to copy
+ * @n: the maximum length of the returned string.
+ *
+ * The talloc_strndup() function is the talloc equivalent of the C library
+ * function strndup(): the result will be truncated to @n characters before
+ * the nul terminator.
+ *
+ * This functions sets the name of the new pointer to the passed string. This
+ * is equivalent to:
+ *
+ * talloc_set_name_const(ptr, ptr)
+ */
+char *talloc_strndup(const void *t, const char *p, size_t n);
+
+/**
+ * talloc_memdup - duplicate some talloc memory
+ *
+ * The talloc_memdup() function is equivalent to:
+ *
+ * ptr = talloc_size(ctx, size);
+ * if (ptr) memcpy(ptr, p, size);
+ */
#define talloc_memdup(t, p, size) _talloc_memdup(t, p, size, __location__)
+/**
+ * talloc_asprintf - sprintf into a talloc buffer.
+ * @t: The context to allocate the buffer from
+ * @fmt: printf-style format for the buffer.
+ *
+ * The talloc_asprintf() function is the talloc equivalent of the C library
+ * function asprintf().
+ *
+ * This functions sets the name of the new pointer to the new string. This is
+ * equivalent to:
+ *
+ * talloc_set_name_const(ptr, ptr)
+ */
+char *talloc_asprintf(const void *t, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
+
+/**
+ * talloc_append_string - concatenate onto a tallocated string
+ * @orig: the tallocated string to append to
+ * @append: the string to add, or NULL to add nothing.
+ *
+ * The talloc_append_string() function appends the given formatted string to
+ * the given string.
+ *
+ * This function sets the name of the new pointer to the new string. This is
+ * equivalent to:
+ *
+ * talloc_set_name_const(ptr, ptr)
+ */
+char *talloc_append_string(char *orig, const char *append);
+
+/**
+ * talloc_asprintf_append - sprintf onto the end of a talloc buffer.
+ * @s: The tallocated string buffer
+ * @fmt: printf-style format to append to the buffer.
+ *
+ * The talloc_asprintf_append() function appends the given formatted string to
+ * the given string.
+ *
+ * This functions sets the name of the new pointer to the new string. This is
+ * equivalent to:
+ * talloc_set_name_const(ptr, ptr)
+ */
+char *talloc_asprintf_append(char *s, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
+
+/**
+ * talloc_vasprintf - vsprintf into a talloc buffer.
+ * @t: The context to allocate the buffer from
+ * @fmt: printf-style format for the buffer
+ * @ap: va_list arguments
+ *
+ * The talloc_vasprintf() function is the talloc equivalent of the C library
+ * function vasprintf()
+ *
+ * This functions sets the name of the new pointer to the new string. This is
+ * equivalent to:
+ *
+ * talloc_set_name_const(ptr, ptr)
+ */
+char *talloc_vasprintf(const void *t, const char *fmt, va_list ap) PRINTF_ATTRIBUTE(2,0);
+
+/**
+ * talloc_vasprintf_append - sprintf onto the end of a talloc buffer.
+ * @t: The context to allocate the buffer from
+ * @fmt: printf-style format for the buffer
+ * @ap: va_list arguments
+ *
+ * The talloc_vasprintf_append() function is equivalent to
+ * talloc_asprintf_append(), except it takes a va_list.
+ */
+char *talloc_vasprintf_append(char *s, const char *fmt, va_list ap) PRINTF_ATTRIBUTE(2,0);
+
+/**
+ * talloc_set_type - force the name of a pointer to a particular type
+ * @ptr: the talloc pointer
+ * @type: the type whose name to set the ptr name to.
+ *
+ * This macro allows you to force the name of a pointer to be a particular
+ * type. This can be used in conjunction with talloc_get_type() to do type
+ * checking on void* pointers.
+ *
+ * It is equivalent to this:
+ * talloc_set_name_const(ptr, #type)
+ */
#define talloc_set_type(ptr, type) talloc_set_name_const(ptr, #type)
+
+/**
+ * talloc_get_type - convert a talloced pointer with typechecking
+ * @ptr: the talloc pointer
+ * @type: the type which we expect the talloced pointer to be.
+ *
+ * This macro allows you to do type checking on talloc pointers. It is
+ * particularly useful for void* private pointers. It is equivalent to this:
+ *
+ * (type *)talloc_check_name(ptr, #type)
+ */
#define talloc_get_type(ptr, type) (type *)talloc_check_name(ptr, #type)
+/**
+ * talloc_find_parent_byname - find a talloc parent by type
+ * @ptr: the talloc pointer
+ * @type: the type we're looking for
+ *
+ * Find a parent memory context of the current context that has the given
+ * name. This can be very useful in complex programs where it may be difficult
+ * to pass all information down to the level you need, but you know the
+ * structure you want is a parent of another context.
+ */
#define talloc_find_parent_bytype(ptr, type) (type *)talloc_find_parent_byname(ptr, #type)
-#if TALLOC_DEPRECATED
-#define talloc_zero_p(ctx, type) talloc_zero(ctx, type)
-#define talloc_p(ctx, type) talloc(ctx, type)
-#define talloc_array_p(ctx, type, count) talloc_array(ctx, type, count)
-#define talloc_realloc_p(ctx, p, type, count) talloc_realloc(ctx, p, type, count)
-#define talloc_destroy(ctx) talloc_free(ctx)
-#endif
-
-/* The following definitions come from talloc.c */
-void *_talloc(const void *context, size_t size);
-void _talloc_set_destructor(const void *ptr, int (*destructor)(void *));
+/**
+ * talloc_increase_ref_count - hold a reference to a talloc pointer
+ * @ptr: the talloc pointer
+ *
+ * The talloc_increase_ref_count(ptr) function is exactly equivalent to:
+ *
+ * talloc_reference(NULL, ptr);
+ *
+ * You can use either syntax, depending on which you think is clearer in your
+ * code.
+ *
+ * It returns 0 on success and -1 on failure.
+ */
int talloc_increase_ref_count(const void *ptr);
-size_t talloc_reference_count(const void *ptr);
-void *_talloc_reference(const void *context, const void *ptr);
-int talloc_unlink(const void *context, void *ptr);
+
+/**
+ * talloc_set_name - set the name for a talloc pointer
+ * @ptr: the talloc pointer
+ * @fmt: the printf-style format string for the name
+ *
+ * Each talloc pointer has a "name". The name is used principally for debugging
+ * purposes, although it is also possible to set and get the name on a pointer
+ * in as a way of "marking" pointers in your code.
+ *
+ * The main use for names on pointer is for "talloc reports". See
+ * talloc_report() and talloc_report_full() for details. Also see
+ * talloc_enable_leak_report() and talloc_enable_leak_report_full().
+ *
+ * The talloc_set_name() function allocates memory as a child of the
+ * pointer. It is logically equivalent to:
+ * talloc_set_name_const(ptr, talloc_asprintf(ptr, fmt, ...));
+ *
+ * Note that multiple calls to talloc_set_name() will allocate more memory
+ * without releasing the name. All of the memory is released when the ptr is
+ * freed using talloc_free().
+ */
const char *talloc_set_name(const void *ptr, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
+
+/**
+ * talloc_set_name_const - set a talloc pointer name to a string constant
+ * @ptr: the talloc pointer to name
+ * @name: the strucng constant.
+ *
+ * The function talloc_set_name_const() is just like talloc_set_name(), but it
+ * takes a string constant, and is much faster. It is extensively used by the
+ * "auto naming" macros, such as talloc().
+ *
+ * This function does not allocate any memory. It just copies the supplied
+ * pointer into the internal representation of the talloc ptr. This means you
+ * must not pass a name pointer to memory that will disappear before the ptr is
+ * freed with talloc_free().
+ */
void talloc_set_name_const(const void *ptr, const char *name);
+
+/**
+ * talloc_named - create a specifically-named talloc pointer
+ * @context: the parent context for the allocation
+ * @size: the size to allocate
+ * @fmt: the printf-style format for the name
+ *
+ * The talloc_named() function creates a named talloc pointer. It is equivalent
+ * to:
+ *
+ * ptr = talloc_size(context, size);
+ * talloc_set_name(ptr, fmt, ....);
+ */
void *talloc_named(const void *context, size_t size,
const char *fmt, ...) PRINTF_ATTRIBUTE(3,4);
+
+/**
+ * talloc_named_const - create a specifically-named talloc pointer
+ * @context: the parent context for the allocation
+ * @size: the size to allocate
+ * @name: the string constant to use as the name
+ *
+ * This is equivalent to:
+ *
+ * ptr = talloc_size(context, size);
+ * talloc_set_name_const(ptr, name);
+ */
void *talloc_named_const(const void *context, size_t size, const char *name);
+
+/**
+ * talloc_get_name - get the name of a talloc pointer
+ * @ptr: the talloc pointer
+ *
+ * This returns the current name for the given talloc pointer. See
+ * talloc_set_name() for details.
+ */
const char *talloc_get_name(const void *ptr);
+
+/**
+ * talloc_check_name - check if a pointer has the specified name
+ * @ptr: the talloc pointer
+ * @name: the name to compare with the pointer's name
+ *
+ * This function checks if a pointer has the specified name. If it does then
+ * the pointer is returned. It it doesn't then NULL is returned.
+ */
void *talloc_check_name(const void *ptr, const char *name);
-void *talloc_parent(const void *ptr);
-const char *talloc_parent_name(const void *ptr);
+
+/**
+ * talloc_init - create a top-level context of particular name
+ * @fmt: the printf-style format of the name
+ *
+ * This function creates a zero length named talloc context as a top level
+ * context. It is equivalent to:
+ *
+ * talloc_named(NULL, 0, fmt, ...);
+ */
void *talloc_init(const char *fmt, ...) PRINTF_ATTRIBUTE(1,2);
-int talloc_free(void *ptr);
-void talloc_free_children(void *ptr);
-void *_talloc_realloc(const void *context, void *ptr, size_t size, const char *name);
-void *_talloc_steal(const void *new_ctx, const void *ptr);
-void *_talloc_move(const void *new_ctx, const void *pptr);
+
+/**
+ * talloc_total_size - get the bytes used by the pointer and its children
+ * @ptr: the talloc pointer
+ *
+ * The talloc_total_size() function returns the total size in bytes used by
+ * this pointer and all child pointers. Mostly useful for debugging.
+ *
+ * Passing NULL is allowed, but it will only give a meaningful result if
+ * talloc_enable_leak_report() or talloc_enable_leak_report_full() has been
+ * called.
+ */
size_t talloc_total_size(const void *ptr);
+
+/**
+ * talloc_total_blocks - get the number of allocations for the pointer
+ * @ptr: the talloc pointer
+ *
+ * The talloc_total_blocks() function returns the total allocations used by
+ * this pointer and all child pointers. Mostly useful for debugging. For
+ * example, a pointer with no children will return "1".
+ *
+ * Passing NULL is allowed, but it will only give a meaningful result if
+ * talloc_enable_leak_report() or talloc_enable_leak_report_full() has been
+ * called.
+ */
size_t talloc_total_blocks(const void *ptr);
+
+/**
+ * talloc_report_depth_cb - walk the entire talloc tree under a talloc pointer
+ * @ptr: the talloc pointer to recurse under
+ * @depth: the current depth of traversal
+ * @max_depth: maximum depth to traverse, or -1 for no maximum
+ * @callback: the function to call on each pointer
+ * @private_data: pointer to hand to @callback.
+ *
+ * This provides a more flexible reports than talloc_report(). It will
+ * recursively call the callback for the entire tree of memory referenced by
+ * the pointer. References in the tree are passed with is_ref = 1 and the
+ * pointer that is referenced.
+ *
+ * You can pass NULL for the pointer, in which case a report is printed for the
+ * top level memory context, but only if talloc_enable_leak_report() or
+ * talloc_enable_leak_report_full() has been called.
+ *
+ * The recursion is stopped when depth >= max_depth. max_depth = -1 means only
+ * stop at leaf nodes.
+ */
void talloc_report_depth_cb(const void *ptr, int depth, int max_depth,
void (*callback)(const void *ptr,
int depth, int max_depth,
int is_ref,
void *private_data),
void *private_data);
+
+/**
+ * talloc_report_depth_file - report talloc usage to a maximum depth
+ * @ptr: the talloc pointer to recurse under
+ * @depth: the current depth of traversal
+ * @max_depth: maximum depth to traverse, or -1 for no maximum
+ * @f: the file to report to
+ *
+ * This provides a more flexible reports than talloc_report(). It will let you
+ * specify the depth and max_depth.
+ */
void talloc_report_depth_file(const void *ptr, int depth, int max_depth, FILE *f);
-void talloc_report_full(const void *ptr, FILE *f);
-void talloc_report(const void *ptr, FILE *f);
+
+/**
+ * talloc_enable_null_tracking - enable tracking of top-level tallocs
+ *
+ * This enables tracking of the NULL memory context without enabling leak
+ * reporting on exit. Useful for when you want to do your own leak reporting
+ * call via talloc_report_null_full();
+ */
void talloc_enable_null_tracking(void);
+
+/**
+ * talloc_disable_null_tracking - enable tracking of top-level tallocs
+ *
+ * This disables tracking of the NULL memory context.
+ */
void talloc_disable_null_tracking(void);
+
+/**
+ * talloc_enable_leak_report - call talloc_report on program exit
+ *
+ * This enables calling of talloc_report(NULL, stderr) when the program
+ * exits. In Samba4 this is enabled by using the --leak-report command line
+ * option.
+ *
+ * For it to be useful, this function must be called before any other talloc
+ * function as it establishes a "null context" that acts as the top of the
+ * tree. If you don't call this function first then passing NULL to
+ * talloc_report() or talloc_report_full() won't give you the full tree
+ * printout.
+ *
+ * Here is a typical talloc report:
+ *
+ * talloc report on 'null_context' (total 267 bytes in 15 blocks)
+ * libcli/auth/spnego_parse.c:55 contains 31 bytes in 2 blocks
+ * libcli/auth/spnego_parse.c:55 contains 31 bytes in 2 blocks
+ * iconv(UTF8,CP850) contains 42 bytes in 2 blocks
+ * libcli/auth/spnego_parse.c:55 contains 31 bytes in 2 blocks
+ * iconv(CP850,UTF8) contains 42 bytes in 2 blocks
+ * iconv(UTF8,UTF-16LE) contains 45 bytes in 2 blocks
+ * iconv(UTF-16LE,UTF8) contains 45 bytes in 2 blocks
+ */
void talloc_enable_leak_report(void);
+
+/**
+ * talloc_enable_leak_report - call talloc_report_full on program exit
+ *
+ * This enables calling of talloc_report_full(NULL, stderr) when the program
+ * exits. In Samba4 this is enabled by using the --leak-report-full command
+ * line option.
+ *
+ * For it to be useful, this function must be called before any other talloc
+ * function as it establishes a "null context" that acts as the top of the
+ * tree. If you don't call this function first then passing NULL to
+ * talloc_report() or talloc_report_full() won't give you the full tree
+ * printout.
+ *
+ * Here is a typical full report:
+ *
+ * full talloc report on 'root' (total 18 bytes in 8 blocks)
+ * p1 contains 18 bytes in 7 blocks (ref 0)
+ * r1 contains 13 bytes in 2 blocks (ref 0)
+ * reference to: p2
+ * p2 contains 1 bytes in 1 blocks (ref 1)
+ * x3 contains 1 bytes in 1 blocks (ref 0)
+ * x2 contains 1 bytes in 1 blocks (ref 0)
+ * x1 contains 1 bytes in 1 blocks (ref 0)
+ */
void talloc_enable_leak_report_full(void);
+
+/**
+ * talloc_autofree_context - a context which will be freed at exit
+ *
+ * This is a handy utility function that returns a talloc context which will be
+ * automatically freed on program exit. This can be used to reduce the noise in
+ * memory leak reports.
+ */
+void *talloc_autofree_context(void);
+
+/**
+ * talloc_get_size - get the size of an allocation
+ * @ctx: the talloc pointer whose allocation to measure.
+ *
+ * This function lets you know the amount of memory alloced so far by this
+ * context. It does NOT account for subcontext memory. This can be used to
+ * calculate the size of an array.
+ */
+size_t talloc_get_size(const void *ctx);
+
+/**
+ * talloc_find_parent_byname - find a parent of this context with this name
+ * @ctx: the context whose ancestors to search
+ * @name: the name to look for
+ *
+ * Find a parent memory context of @ctx that has the given name. This can be
+ * very useful in complex programs where it may be difficult to pass all
+ * information down to the level you need, but you know the structure you want
+ * is a parent of another context.
+ */
+void *talloc_find_parent_byname(const void *ctx, const char *name);
+
+/* The following definitions come from talloc.c */
+void *_talloc(const void *context, size_t size);
+void _talloc_set_destructor(const void *ptr, int (*destructor)(void *));
+size_t talloc_reference_count(const void *ptr);
+void *_talloc_reference(const void *context, const void *ptr);
+
+void *_talloc_realloc(const void *context, void *ptr, size_t size, const char *name);
+void *talloc_parent(const void *ptr);
+const char *talloc_parent_name(const void *ptr);
+void *_talloc_steal(const void *new_ctx, const void *ptr);
+void *_talloc_move(const void *new_ctx, const void *pptr);
void *_talloc_zero(const void *ctx, size_t size, const char *name);
void *_talloc_memdup(const void *t, const void *p, size_t size, const char *name);
-char *talloc_strdup(const void *t, const char *p);
-char *talloc_strndup(const void *t, const char *p, size_t n);
-char *talloc_append_string(const void *t, char *orig, const char *append);
-char *talloc_vasprintf(const void *t, const char *fmt, va_list ap) PRINTF_ATTRIBUTE(2,0);
-char *talloc_vasprintf_append(char *s, const char *fmt, va_list ap) PRINTF_ATTRIBUTE(2,0);
-char *talloc_asprintf(const void *t, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
-char *talloc_asprintf_append(char *s, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
void *_talloc_array(const void *ctx, size_t el_size, unsigned count, const char *name);
void *_talloc_zero_array(const void *ctx, size_t el_size, unsigned count, const char *name);
void *_talloc_realloc_array(const void *ctx, void *ptr, size_t el_size, unsigned count, const char *name);
void *talloc_realloc_fn(const void *context, void *ptr, size_t size);
-void *talloc_autofree_context(void);
-size_t talloc_get_size(const void *ctx);
-void *talloc_find_parent_byname(const void *ctx, const char *name);
void talloc_show_parents(const void *context, FILE *file);
int talloc_is_parent(const void *context, const void *ptr);
-#endif
+#endif /* CCAN_TALLOC_H */
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