platform: library: add k_heap* types and functions

Add a definition of struct k_heap and SOF k_heap wrappers
sof_heap_alloc() and sof_heap_free() for host native builds.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

posix/include/rtos/alloc.h

@@ -131,6 +131,14 @@ void rfree(void *ptr);
  */
 void *rzalloc_core_sys(int core, size_t bytes);
 
+struct k_heap;
+static inline void k_heap_init(struct k_heap *heap, void *mem, size_t bytes)
+{
+}
+void *sof_heap_alloc(struct k_heap *heap, uint32_t flags, size_t bytes,
+		     size_t alignment);
+void sof_heap_free(struct k_heap *heap, void *addr);
+
 /**
  * Calculates length of the null-terminated string.
  * @param s String.

posix/include/rtos/kernel.h

@@ -43,4 +43,8 @@ static inline void k_usleep(int32_t us)
 	wait_delay_us(us);
 }
 
+struct k_heap {
+	int unused;
+};
+
 #endif /* __POSIX_RTOS_KERNEL_H__ */

src/lib/alloc.c

@@ -71,3 +71,14 @@ int heap_info(int index, struct mm_info *out)
 	return 0;
 }
 #endif
+
+void *sof_heap_alloc(struct k_heap *heap, uint32_t flags, size_t bytes,
+		     size_t alignment)
+{
+	return malloc(bytes);
+}
+
+void sof_heap_free(struct k_heap *heap, void *addr)
+{
+	free(addr);
+}

src/platform/library/lib/alloc.c

@@ -48,6 +48,17 @@ void *rbrealloc_align(void *ptr, uint32_t flags, size_t bytes,
 	return realloc(ptr, bytes);
 }
 
+void *sof_heap_alloc(struct k_heap *heap, uint32_t flags, size_t bytes,
+		     size_t alignment)
+{
+	return malloc(bytes);
+}
+
+void sof_heap_free(struct k_heap *heap, void *addr)
+{
+	free(addr);
+}
+
 void heap_trace(struct mm_heap *heap, int size)
 {
 #if MALLOC_DEBUG

test/cmocka/src/common_mocks.c

@@ -122,6 +122,23 @@ int WEAK mod_free(struct processing_module *mod, const void *ptr)
 	return 0;
 }
 
+void WEAK *sof_heap_alloc(struct k_heap *heap, uint32_t flags, size_t bytes,
+		     size_t alignment)
+{
+	(void)heap;
+	(void)flags;
+	(void)alignment;
+
+	return malloc(bytes);
+}
+
+void WEAK sof_heap_free(struct k_heap *heap, void *addr)
+{
+	(void)heap;
+
+	free(addr);
+}
+
 int WEAK memcpy_s(void *dest, size_t dest_size,
 		  const void *src, size_t count)
 {