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Adds a custom Allocator wrapper which keeps track of the allocated memory, then record the maximum allocation readings in the Runner alongside timing readings and carry them into the Result.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| const std = @import("std"); | ||
| const Allocator = std.mem.Allocator; | ||
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| const TrackingAllocator = @This(); | ||
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| parent_allocator: Allocator, | ||
| current_allocated: usize = 0, | ||
| max_allocated: usize = 0, | ||
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| pub fn init(parent_allocator: Allocator) TrackingAllocator { | ||
| return .{ | ||
| .parent_allocator = parent_allocator, | ||
| }; | ||
| } | ||
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| pub fn allocator(self: *TrackingAllocator) Allocator { | ||
| return .{ | ||
| .ptr = self, | ||
| .vtable = &.{ | ||
| .alloc = alloc, | ||
| .resize = resize, | ||
| .free = free, | ||
| }, | ||
| }; | ||
| } | ||
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| pub fn maxAllocated(self: TrackingAllocator) usize { | ||
| return self.max_allocated; | ||
| } | ||
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| fn alloc( | ||
| ctx: *anyopaque, | ||
| len: usize, | ||
| log2_ptr_align: u8, | ||
| ra: usize, | ||
| ) ?[*]u8 { | ||
| const self: *TrackingAllocator = @ptrCast(@alignCast(ctx)); | ||
| const result = self.parent_allocator.rawAlloc(len, log2_ptr_align, ra); | ||
| if (result) |_| { | ||
| self.current_allocated += len; | ||
| if (self.max_allocated < self.current_allocated) | ||
| self.max_allocated = self.current_allocated; | ||
| } | ||
| return result; | ||
| } | ||
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| fn resize( | ||
| ctx: *anyopaque, | ||
| buf: []u8, | ||
| log2_buf_align: u8, | ||
| new_len: usize, | ||
| ra: usize, | ||
| ) bool { | ||
| const self: *TrackingAllocator = @ptrCast(@alignCast(ctx)); | ||
| const result = self.parent_allocator.rawResize(buf, log2_buf_align, new_len, ra); | ||
| if (result) { | ||
| if (buf.len < new_len) { | ||
| self.current_allocated += new_len - buf.len; | ||
| if (self.max_allocated < self.current_allocated) | ||
| self.max_allocated = self.current_allocated; | ||
| } else self.current_allocated -= buf.len - new_len; | ||
| } | ||
| return result; | ||
| } | ||
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| fn free( | ||
| ctx: *anyopaque, | ||
| buf: []u8, | ||
| log2_buf_align: u8, | ||
| ra: usize, | ||
| ) void { | ||
| const self: *TrackingAllocator = @ptrCast(@alignCast(ctx)); | ||
| self.parent_allocator.rawFree(buf, log2_buf_align, ra); | ||
| self.current_allocated -= buf.len; | ||
| } | ||
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| /// This allocator is used in front of another allocator and tracks the maximum | ||
| /// memory usage on every call to the allocator. | ||
| pub fn trackingAllocator(parent_allocator: Allocator) TrackingAllocator { | ||
| return TrackingAllocator.init(parent_allocator); | ||
| } |
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