143 lines
2.9 KiB
C
143 lines
2.9 KiB
C
/*
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* Copyright (c) 2017 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <string.h>
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#include <sys/math_extras.h>
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#include <sys/util.h>
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static void *z_heap_aligned_alloc(struct k_heap *heap, size_t align, size_t size)
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{
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void *mem;
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struct k_heap **heap_ref;
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size_t __align;
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/*
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* Adjust the size to make room for our heap reference.
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* Merge a rewind bit with align value (see sys_heap_aligned_alloc()).
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* This allows for storing the heap pointer right below the aligned
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* boundary without wasting any memory.
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*/
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if (size_add_overflow(size, sizeof(heap_ref), &size)) {
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return NULL;
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}
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__align = align | sizeof(heap_ref);
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mem = k_heap_aligned_alloc(heap, __align, size, K_NO_WAIT);
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if (mem == NULL) {
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return NULL;
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}
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heap_ref = mem;
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*heap_ref = heap;
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mem = ++heap_ref;
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__ASSERT(align == 0 || ((uintptr_t)mem & (align - 1)) == 0,
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"misaligned memory at %p (align = %zu)", mem, align);
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return mem;
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}
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void k_free(void *ptr)
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{
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struct k_heap **heap_ref;
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if (ptr != NULL) {
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heap_ref = ptr;
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ptr = --heap_ref;
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SYS_PORT_TRACING_OBJ_FUNC_ENTER(k_heap_sys, k_free, *heap_ref);
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k_heap_free(*heap_ref, ptr);
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SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_heap_sys, k_free, *heap_ref);
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}
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}
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#if (CONFIG_HEAP_MEM_POOL_SIZE > 0)
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K_HEAP_DEFINE(_system_heap, CONFIG_HEAP_MEM_POOL_SIZE);
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#define _SYSTEM_HEAP (&_system_heap)
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void *k_aligned_alloc(size_t align, size_t size)
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{
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__ASSERT(align / sizeof(void *) >= 1
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&& (align % sizeof(void *)) == 0,
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"align must be a multiple of sizeof(void *)");
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__ASSERT((align & (align - 1)) == 0,
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"align must be a power of 2");
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SYS_PORT_TRACING_OBJ_FUNC_ENTER(k_heap_sys, k_aligned_alloc, _SYSTEM_HEAP);
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void *ret = z_heap_aligned_alloc(_SYSTEM_HEAP, align, size);
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SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_heap_sys, k_aligned_alloc, _SYSTEM_HEAP, ret);
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return ret;
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}
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void *k_malloc(size_t size)
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{
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SYS_PORT_TRACING_OBJ_FUNC_ENTER(k_heap_sys, k_malloc, _SYSTEM_HEAP);
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void *ret = k_aligned_alloc(sizeof(void *), size);
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SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_heap_sys, k_malloc, _SYSTEM_HEAP, ret);
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return ret;
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}
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void *k_calloc(size_t nmemb, size_t size)
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{
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void *ret;
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size_t bounds;
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SYS_PORT_TRACING_OBJ_FUNC_ENTER(k_heap_sys, k_calloc, _SYSTEM_HEAP);
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if (size_mul_overflow(nmemb, size, &bounds)) {
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SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_heap_sys, k_calloc, _SYSTEM_HEAP, NULL);
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return NULL;
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}
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ret = k_malloc(bounds);
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if (ret != NULL) {
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(void)memset(ret, 0, bounds);
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}
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SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_heap_sys, k_calloc, _SYSTEM_HEAP, ret);
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return ret;
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}
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void k_thread_system_pool_assign(struct k_thread *thread)
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{
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thread->resource_pool = _SYSTEM_HEAP;
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}
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#else
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#define _SYSTEM_HEAP NULL
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#endif
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void *z_thread_aligned_alloc(size_t align, size_t size)
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{
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void *ret;
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struct k_heap *heap;
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if (k_is_in_isr()) {
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heap = _SYSTEM_HEAP;
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} else {
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heap = _current->resource_pool;
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}
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if (heap != NULL) {
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ret = z_heap_aligned_alloc(heap, align, size);
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} else {
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ret = NULL;
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}
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return ret;
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}
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