diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/talloc/talloc_guide.txt | 43 |
1 files changed, 26 insertions, 17 deletions
diff --git a/lib/talloc/talloc_guide.txt b/lib/talloc/talloc_guide.txt index 18663b370d..3201fe6f0f 100644 --- a/lib/talloc/talloc_guide.txt +++ b/lib/talloc/talloc_guide.txt @@ -1,5 +1,7 @@ Using talloc in Samba4 ----------------------- +====================== + +.. contents:: Andrew Tridgell September 2004 @@ -18,7 +20,7 @@ get used to it. Perhaps the biggest change from Samba3 is that there is no distinction between a "talloc context" and a "talloc pointer". Any pointer returned from talloc() is itself a valid talloc context. This means -you can do this: +you can do this:: struct foo *X = talloc(mem_ctx, struct foo); X->name = talloc_strdup(X, "foo"); @@ -271,7 +273,7 @@ equivalent to: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- void *talloc_named_const(const void *context, size_t size, const char *name); -This is equivalent to: +This is equivalent to:: ptr = talloc_size(context, size); talloc_set_name_const(ptr, name); @@ -288,7 +290,7 @@ talloc_set_name() for details. void *talloc_init(const char *fmt, ...); This function creates a zero length named talloc context as a top -level context. It is equivalent to: +level context. It is equivalent to:: talloc_named(NULL, 0, fmt, ...); @@ -309,7 +311,7 @@ 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() has the following equivalences:: talloc_realloc(context, NULL, type, 1) ==> talloc(context, type); talloc_realloc(context, NULL, type, N) ==> talloc_array(context, type, N); @@ -490,7 +492,7 @@ This disables tracking of the NULL memory context. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- (type *)talloc_zero(const void *ctx, type); -The talloc_zero() macro is equivalent to: +The talloc_zero() macro is equivalent to:: ptr = talloc(ctx, type); if (ptr) memset(ptr, 0, sizeof(type)); @@ -505,7 +507,7 @@ The talloc_zero_size() function is useful when you don't have a known type =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- void *talloc_memdup(const void *ctx, const void *p, size_t size); -The talloc_memdup() function is equivalent to: +The talloc_memdup() function is equivalent to:: ptr = talloc_size(ctx, size); if (ptr) memcpy(ptr, p, size); @@ -514,13 +516,14 @@ The talloc_memdup() function is equivalent to: =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- char *talloc_strdup(const void *ctx, const char *p); -The talloc_strdup() function is equivalent to: +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: +string. This is equivalent to:: + talloc_set_name_const(ptr, ptr) =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- @@ -540,7 +543,8 @@ 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: +string. This is equivalent to:: + talloc_set_name_const(ptr, ptr) =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- @@ -550,7 +554,8 @@ 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: +string. This is equivalent to:: + talloc_set_name_const(ptr, ptr) @@ -561,7 +566,8 @@ 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: +string. This is equivalent to:: + talloc_set_name_const(ptr, ptr) @@ -574,7 +580,8 @@ Use this varient when the string in the current talloc buffer may have been truncated in length. This functions sets the name of the new pointer to the new -string. This is equivalent to: +string. This is equivalent to:: + talloc_set_name_const(ptr, ptr) @@ -587,14 +594,15 @@ Use this varient when the string in the current talloc buffer has not been changed. This functions sets the name of the new pointer to the new -string. This is equivalent to: +string. This is equivalent to:: + talloc_set_name_const(ptr, ptr) =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- ((type *)talloc_array(const void *ctx, type, uint_t count); -The talloc_array() macro is equivalent to: +The talloc_array() macro is equivalent to:: (type *)talloc_size(ctx, sizeof(type) * count); @@ -648,7 +656,7 @@ then the pointer is returned. It it doesn't then NULL is returned. This macro allows you to do type checking on talloc pointers. It is particularly useful for void* private pointers. It is equivalent to -this: +this:: (type *)talloc_check_name(ptr, #type) @@ -660,7 +668,8 @@ 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: +It is equivalent to this:: + talloc_set_name_const(ptr, #type) =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- |