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adjust runtime page size APIs

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* fix merge conflicts
* rename the declarations
* reword documentation
* extract FixedBufferAllocator to separate file
* take advantage of locals
* remove the assertion about max alignment in Allocator API, leaving it
  Allocator implementation defined
* fix non-inline function call in start logic

The GeneralPurposeAllocator implementation is totally broken because it
uses global state but I didn't address that in this commit.
This commit is contained in:
Andrew Kelley
2025-01-29 14:16:25 -08:00
parent 439667be04
commit 284de7d957
23 changed files with 723 additions and 718 deletions
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4
lib/std/debug/MemoryAccessor.zig
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@@ -7,7 +7,7 @@ const native_os = builtin.os.tag;
const std = @import("../std.zig");
const posix = std.posix;
const File = std.fs.File;
const min_page_size = std.heap.min_page_size;
const page_size_min = std.heap.page_size_min;
const MemoryAccessor = @This();
@@ -96,7 +96,7 @@ pub fn isValidMemory(address: usize) bool {
const page_size = std.heap.pageSize();
const aligned_address = address & ~(page_size - 1);
if (aligned_address == 0) return false;
const aligned_memory = @as([*]align(min_page_size) u8, @ptrFromInt(aligned_address))[0..page_size];
const aligned_memory = @as([*]align(page_size_min) u8, @ptrFromInt(aligned_address))[0..page_size];
if (native_os == .windows) {
const windows = std.os.windows;