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151 lines
3.1 KiB
C
151 lines
3.1 KiB
C
// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
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// Use of this source code is governed by the MIT license
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// a copy of which can be found in the LICENSE_STDLIB file.
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module std::core::mem;
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macro @volatile_load(&x)
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{
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return $$volatile_load(&x);
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}
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macro @volatile_store(&x, y)
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{
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return $$volatile_store(&x, y);
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}
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/**
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* @require math::is_power_of_2(alignment)
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**/
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fn usize aligned_offset(usize offset, usize alignment)
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{
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return alignment * ((offset + alignment - 1) / alignment);
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}
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/**
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* @require math::is_power_of_2(alignment)
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**/
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fn bool ptr_is_aligned(void* ptr, usize alignment) @inline
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{
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return (uptr)ptr & ((uptr)alignment - 1) == 0;
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}
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fn void copy(char* dst, char* src, usize size) @inline
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{
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memcpy(dst, src, size);
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}
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macro void memcpy(void* dst, void* src, usize size, bool $is_volatile = false, usize $dst_align = 0, usize $src_align = 0)
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{
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$$memcpy(dst, src, size, $is_volatile, $dst_align, $src_align);
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}
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fn void set(void* dst, char val, usize bytes) @inline
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{
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memset(dst, val, bytes);
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}
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macro void memset(void* dst, char val, usize bytes, bool $is_volatile = false, usize $dst_align = 0)
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{
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$$memset(dst, val, bytes, $is_volatile, $dst_align);
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}
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macro @clone(&value) @builtin
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{
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$typeof(value)* x = malloc($typeof(value));
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*x = value;
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return x;
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}
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macro malloc($Type) @builtin
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{
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return ($Type*)(mem::alloc($Type.sizeof));
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}
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fn char[] alloc_bytes(usize bytes) @inline
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{
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return ((char*)thread_allocator.alloc(bytes, 1))[0..bytes - 1]!!;
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}
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/**
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* @require !alignment || math::is_power_of_2(alignment)
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*/
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fn void* alloc(usize size, usize alignment = 0)
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{
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return thread_allocator.alloc(size, alignment)!!;
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}
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/**
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* @require !alignment || math::is_power_of_2(alignment)
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*/
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fn void*! alloc_checked(usize size, usize alignment = 0)
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{
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return thread_allocator.alloc(size, alignment);
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}
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/**
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* @require !alignment || math::is_power_of_2(alignment)
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*/
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fn void* calloc(usize size, usize alignment = 0)
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{
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return thread_allocator.calloc(size, alignment)!!;
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}
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/**
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* @require !alignment || math::is_power_of_2(alignment)
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*/
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fn void*! calloc_checked(usize size, usize alignment = 0)
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{
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return thread_allocator.calloc(size, alignment);
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}
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/**
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* @require !alignment || math::is_power_of_2(alignment)
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*/
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fn void* realloc(void *ptr, usize new_size, usize alignment = 0)
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{
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return thread_allocator.realloc(ptr, new_size, alignment)!!;
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}
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/**
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* @require !alignment || math::is_power_of_2(alignment)
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*/
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fn void*! realloc_checked(void *ptr, usize new_size, usize alignment = 0)
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{
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return thread_allocator.realloc(ptr, new_size, alignment);
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}
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fn void free(void* ptr) @builtin
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{
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return thread_allocator.free(ptr)!!;
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}
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/**
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* Run with a specific allocator inside of the macro body.
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**/
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macro void @with_allocator(Allocator* allocator; @body())
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{
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Allocator* old_allocator = thread_allocator;
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thread_allocator = allocator;
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defer thread_allocator = old_allocator;
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@body();
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}
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fn void*! talloc(usize size)
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{
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return temp_allocator.alloc(size);
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}
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private tlocal Allocator* thread_allocator = allocator::LIBC_ALLOCATOR;
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macro Allocator* current_allocator()
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{
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return thread_allocator;
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}
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