Mercurial > hg > idav / file diff

--- a/ucx/cx/allocator.h	Thu Dec 12 20:01:43 2024 +0100
+++ b/ucx/cx/allocator.h	Mon Jan 06 22:22:55 2025 +0100
@@ -26,7 +26,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /**
- * \file allocator.h
+ * @file allocator.h
  * Interface for custom allocators.
  */
 
@@ -54,7 +54,6 @@
     /**
      * The allocator's realloc() implementation.
      */
-    __attribute__((__warn_unused_result__))
     void *(*realloc)(
             void *data,
             void *mem,
@@ -73,7 +72,6 @@
     /**
      * The allocator's free() implementation.
      */
-    __attribute__((__nonnull__))
     void (*free)(
             void *data,
             void *mem
@@ -108,76 +106,157 @@
  * Function pointer type for destructor functions.
  *
  * A destructor function deallocates possible contents and MAY free the memory
- * pointed to by \p memory. Read the documentation of the respective function
- * pointer to learn if a destructor SHALL, MAY, or MUST NOT free the memory in that
- * particular implementation.
+ * pointed to by @p memory. Read the documentation of the respective function
+ * pointer to learn if a destructor SHALL, MAY, or MUST NOT free the memory in
+ * that particular implementation.
  *
  * @param memory a pointer to the object to destruct
   */
-__attribute__((__nonnull__))
 typedef void (*cx_destructor_func)(void *memory);
 
 /**
  * Function pointer type for destructor functions.
  *
  * A destructor function deallocates possible contents and MAY free the memory
- * pointed to by \p memory. Read the documentation of the respective function
- * pointer to learn if a destructor SHALL, MAY, or MUST NOT free the memory in that
- * particular implementation.
+ * pointed to by @p memory. Read the documentation of the respective function
+ * pointer to learn if a destructor SHALL, MAY, or MUST NOT free the memory in
+ * that particular implementation.
  *
  * @param data an optional pointer to custom data
  * @param memory a pointer to the object to destruct
   */
-__attribute__((__nonnull__(2)))
 typedef void (*cx_destructor_func2)(
         void *data,
         void *memory
 );
 
 /**
- * Re-allocate a previously allocated block and changes the pointer in-place, if necessary.
+ * Re-allocate a previously allocated block and changes the pointer in-place,
+ * if necessary.
  *
- * \par Error handling
- * \c errno will be set by realloc() on failure.
+ * @par Error handling
+ * @c errno will be set by realloc() on failure.
  *
  * @param mem pointer to the pointer to allocated block
  * @param n the new size in bytes
- * @return zero on success, non-zero on failure
+ * @retval zero success
+ * @retval non-zero failure
+ * @see cx_reallocatearray()
  */
-__attribute__((__nonnull__))
+cx_attr_nonnull
+cx_attr_nodiscard
 int cx_reallocate(
         void **mem,
         size_t n
 );
 
 /**
- * Allocate \p n bytes of memory.
+ * Re-allocate a previously allocated block and changes the pointer in-place,
+ * if necessary.
+ *
+ * The size is calculated by multiplying @p nemb and @p size.
+ *
+ * @par Error handling
+ * @c errno will be set by realloc() on failure or when the multiplication of
+ * @p nmemb and @p size overflows.
+ *
+ * @param mem pointer to the pointer to allocated block
+ * @param nmemb the number of elements
+ * @param size the size of each element
+ * @retval zero success
+ * @retval non-zero failure
+ * @see cx_reallocate()
+ */
+cx_attr_nonnull
+cx_attr_nodiscard
+int cx_reallocatearray(
+        void **mem,
+        size_t nmemb,
+        size_t size
+);
+
+/**
+ * Re-allocate a previously allocated block and changes the pointer in-place,
+ * if necessary.
+ *
+ * @par Error handling
+ * @c errno will be set by realloc() on failure.
+ *
+ * @param mem (@c void**) pointer to the pointer to allocated block
+ * @param n (@c size_t) the new size in bytes
+ * @retval zero success
+ * @retval non-zero failure
+ * @see cx_reallocatearray()
+ */
+#define cx_reallocate(mem, n) cx_reallocate((void**)(mem), n)
+
+/**
+ * Re-allocate a previously allocated block and changes the pointer in-place,
+ * if necessary.
+ *
+ * The size is calculated by multiplying @p nemb and @p size.
+ *
+ * @par Error handling
+ * @c errno will be set by realloc() on failure or when the multiplication of
+ * @p nmemb and @p size overflows.
+ *
+ * @param mem (@c void**) pointer to the pointer to allocated block
+ * @param nmemb (@c size_t) the number of elements
+ * @param size (@c size_t) the size of each element
+ * @retval zero success
+ * @retval non-zero failure
+ */
+#define cx_reallocatearray(mem, nmemb, size) \
+    cx_reallocatearray((void**)(mem), nmemb, size)
+
+/**
+ * Free a block allocated by this allocator.
+ *
+ * @note Freeing a block of a different allocator is undefined.
+ *
+ * @param allocator the allocator
+ * @param mem a pointer to the block to free
+ */
+cx_attr_nonnull_arg(1)
+void cxFree(
+        const CxAllocator *allocator,
+        void *mem
+);
+
+/**
+ * Allocate @p n bytes of memory.
  *
  * @param allocator the allocator
  * @param n the number of bytes
  * @return a pointer to the allocated memory
  */
-__attribute__((__malloc__))
-__attribute__((__alloc_size__(2)))
+cx_attr_nodiscard
+cx_attr_nonnull
+cx_attr_malloc
+cx_attr_dealloc_ucx
+cx_attr_allocsize(2)
 void *cxMalloc(
         const CxAllocator *allocator,
         size_t n
 );
 
 /**
- * Re-allocate the previously allocated block in \p mem, making the new block \p n bytes long.
- * This function may return the same pointer that was passed to it, if moving the memory
- * was not necessary.
+ * Re-allocate the previously allocated block in @p mem, making the new block
+ * @p n bytes long.
+ * This function may return the same pointer that was passed to it, if moving
+ * the memory was not necessary.
  *
- * \note Re-allocating a block allocated by a different allocator is undefined.
+ * @note Re-allocating a block allocated by a different allocator is undefined.
  *
  * @param allocator the allocator
  * @param mem pointer to the previously allocated block
  * @param n the new size in bytes
  * @return a pointer to the re-allocated memory
  */
-__attribute__((__warn_unused_result__))
-__attribute__((__alloc_size__(3)))
+cx_attr_nodiscard
+cx_attr_nonnull_arg(1)
+cx_attr_dealloc_ucx
+cx_attr_allocsize(3)
 void *cxRealloc(
         const CxAllocator *allocator,
         void *mem,
@@ -185,20 +264,52 @@
 );
 
 /**
- * Re-allocate a previously allocated block and changes the pointer in-place, if necessary.
- * This function acts like cxRealloc() using the pointer pointed to by \p mem.
+ * Re-allocate the previously allocated block in @p mem, making the new block
+ * @p n bytes long.
+ * This function may return the same pointer that was passed to it, if moving
+ * the memory was not necessary.
+ *
+ * The size is calculated by multiplying @p nemb and @p size.
+ * If that multiplication overflows, this function returns @c NULL and @c errno
+ * will be set.
+ *
+ * @note Re-allocating a block allocated by a different allocator is undefined.
  *
- * \note Re-allocating a block allocated by a different allocator is undefined.
+ * @param allocator the allocator
+ * @param mem pointer to the previously allocated block
+ * @param nmemb the number of elements
+ * @param size the size of each element
+ * @return a pointer to the re-allocated memory
+ */
+cx_attr_nodiscard
+cx_attr_nonnull_arg(1)
+cx_attr_dealloc_ucx
+cx_attr_allocsize(3, 4)
+void *cxReallocArray(
+        const CxAllocator *allocator,
+        void *mem,
+        size_t nmemb,
+        size_t size
+);
+
+/**
+ * Re-allocate a previously allocated block and changes the pointer in-place,
+ * if necessary.
+ * This function acts like cxRealloc() using the pointer pointed to by @p mem.
  *
- * \par Error handling
- * \c errno will be set, if the underlying realloc function does so.
+ * @note Re-allocating a block allocated by a different allocator is undefined.
+ *
+ * @par Error handling
+ * @c errno will be set, if the underlying realloc function does so.
  *
  * @param allocator the allocator
  * @param mem pointer to the pointer to allocated block
  * @param n the new size in bytes
- * @return zero on success, non-zero on failure
+ * @retval zero success
+ * @retval non-zero failure
  */
-__attribute__((__nonnull__))
+cx_attr_nodiscard
+cx_attr_nonnull
 int cxReallocate(
         const CxAllocator *allocator,
         void **mem,
@@ -206,35 +317,93 @@
 );
 
 /**
- * Allocate \p nelem elements of \p n bytes each, all initialized to zero.
+ * Re-allocate a previously allocated block and changes the pointer in-place,
+ * if necessary.
+ * This function acts like cxRealloc() using the pointer pointed to by @p mem.
+ *
+ * @note Re-allocating a block allocated by a different allocator is undefined.
+ *
+ * @par Error handling
+ * @c errno will be set, if the underlying realloc function does so.
+ *
+ * @param allocator (@c CxAllocator*) the allocator
+ * @param mem (@c void**) pointer to the pointer to allocated block
+ * @param n (@c size_t) the new size in bytes
+ * @retval zero success
+ * @retval non-zero failure
+ */
+#define cxReallocate(allocator, mem, n) \
+    cxReallocate(allocator, (void**)(mem), n)
+
+/**
+ * Re-allocate a previously allocated block and changes the pointer in-place,
+ * if necessary.
+ * This function acts like cxReallocArray() using the pointer pointed to
+ * by @p mem.
+ *
+ * @note Re-allocating a block allocated by a different allocator is undefined.
+ *
+ * @par Error handling
+ * @c errno will be set, if the underlying realloc function does so or the
+ * multiplication of @p nmemb and @p size overflows.
+ *
+ * @param allocator the allocator
+ * @param mem pointer to the pointer to allocated block
+ * @param nmemb the number of elements
+ * @param size the size of each element
+ * @retval zero success
+ * @retval non-zero on failure
+ */
+cx_attr_nodiscard
+cx_attr_nonnull
+int cxReallocateArray(
+        const CxAllocator *allocator,
+        void **mem,
+        size_t nmemb,
+        size_t size
+);
+
+/**
+ * Re-allocate a previously allocated block and changes the pointer in-place,
+ * if necessary.
+ * This function acts like cxReallocArray() using the pointer pointed to
+ * by @p mem.
+ *
+ * @note Re-allocating a block allocated by a different allocator is undefined.
+ *
+ * @par Error handling
+ * @c errno will be set, if the underlying realloc function does so or the
+ * multiplication of @p nmemb and @p size overflows.
+ *
+ * @param allocator (@c CxAllocator*) the allocator
+ * @param mem (@c void**) pointer to the pointer to allocated block
+ * @param nmemb (@c size_t) the number of elements
+ * @param size (@c size_t) the size of each element
+ * @retval zero success
+ * @retval non-zero failure
+ */
+#define cxReallocateArray(allocator, mem, nmemb, size) \
+        cxReallocateArray(allocator, (void**) (mem), nmemb, size)
+
+/**
+ * Allocate @p nelem elements of @p n bytes each, all initialized to zero.
  *
  * @param allocator the allocator
  * @param nelem the number of elements
  * @param n the size of each element in bytes
  * @return a pointer to the allocated memory
  */
-__attribute__((__malloc__))
-__attribute__((__alloc_size__(2, 3)))
+cx_attr_nonnull_arg(1)
+cx_attr_nodiscard
+cx_attr_malloc
+cx_attr_dealloc_ucx
+cx_attr_allocsize(2, 3)
 void *cxCalloc(
         const CxAllocator *allocator,
         size_t nelem,
         size_t n
 );
 
-/**
- * Free a block allocated by this allocator.
- *
- * \note Freeing a block of a different allocator is undefined.
- *
- * @param allocator the allocator
- * @param mem a pointer to the block to free
- */
-__attribute__((__nonnull__))
-void cxFree(
-        const CxAllocator *allocator,
-        void *mem
-);
-
 #ifdef __cplusplus
 } // extern "C"
 #endif