adjust runtime page size APIs

* 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.

1 files changed, 7 insertions, 8 deletions

diff --git a/lib/std/debug.zig b/lib/std/debug.zig
index a3aacf769e..9deca6de49 100644
--- a/lib/std/debug.zig
+++ b/lib/std/debug.zig
@@ -2,7 +2,6 @@ const builtin = @import("builtin");
 const std = @import("std.zig");
 const math = std.math;
 const mem = std.mem;
-const heap = std.heap;
 const io = std.io;
 const posix = std.posix;
 const fs = std.fs;
@@ -1238,7 +1237,7 @@ test printLineFromFileAnyOs {
 
         const overlap = 10;
         var writer = file.writer();
-        try writer.writeByteNTimes('a', heap.min_page_size - overlap);
+        try writer.writeByteNTimes('a', std.heap.page_size_min - overlap);
         try writer.writeByte('\n');
         try writer.writeByteNTimes('a', overlap);
 
@@ -1253,10 +1252,10 @@ test printLineFromFileAnyOs {
         defer allocator.free(path);
 
         var writer = file.writer();
-        try writer.writeByteNTimes('a', heap.max_page_size);
+        try writer.writeByteNTimes('a', std.heap.page_size_max);
 
         try printLineFromFileAnyOs(output_stream, .{ .file_name = path, .line = 1, .column = 0 });
-        try expectEqualStrings(("a" ** heap.max_page_size) ++ "\n", output.items);
+        try expectEqualStrings(("a" ** std.heap.page_size_max) ++ "\n", output.items);
         output.clearRetainingCapacity();
     }
     {
@@ -1266,18 +1265,18 @@ test printLineFromFileAnyOs {
         defer allocator.free(path);
 
         var writer = file.writer();
-        try writer.writeByteNTimes('a', 3 * heap.max_page_size);
+        try writer.writeByteNTimes('a', 3 * std.heap.page_size_max);
 
         try expectError(error.EndOfFile, printLineFromFileAnyOs(output_stream, .{ .file_name = path, .line = 2, .column = 0 }));
 
         try printLineFromFileAnyOs(output_stream, .{ .file_name = path, .line = 1, .column = 0 });
-        try expectEqualStrings(("a" ** (3 * heap.max_page_size)) ++ "\n", output.items);
+        try expectEqualStrings(("a" ** (3 * std.heap.page_size_max)) ++ "\n", output.items);
         output.clearRetainingCapacity();
 
         try writer.writeAll("a\na");
 
         try printLineFromFileAnyOs(output_stream, .{ .file_name = path, .line = 1, .column = 0 });
-        try expectEqualStrings(("a" ** (3 * heap.max_page_size)) ++ "a\n", output.items);
+        try expectEqualStrings(("a" ** (3 * std.heap.page_size_max)) ++ "a\n", output.items);
         output.clearRetainingCapacity();
 
         try printLineFromFileAnyOs(output_stream, .{ .file_name = path, .line = 2, .column = 0 });
@@ -1291,7 +1290,7 @@ test printLineFromFileAnyOs {
         defer allocator.free(path);
 
         var writer = file.writer();
-        const real_file_start = 3 * heap.min_page_size;
+        const real_file_start = 3 * std.heap.page_size_min;
         try writer.writeByteNTimes('\n', real_file_start);
         try writer.writeAll("abc\ndef");