lib/tests/is_signed_type_kunit.c

File Facts

System

Linux kernel

Corpus path

lib/tests/is_signed_type_kunit.c

Extension

.c

Size

1560 bytes

Lines

51

Domain

Kernel Services

Bucket

lib

Inferred role

Kernel Services: implementation source

Status

source implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

• Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• kunit/test.h
• linux/compiler.h

Detected Declarations

• enum unsigned_enum
• enum signed_enum
• function is_signed_type_test

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
 *	./tools/testing/kunit/kunit.py run is_signed_type [--raw_output]
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <kunit/test.h>
#include <linux/compiler.h>

enum unsigned_enum {
	constant_a = 3,
};

enum signed_enum {
	constant_b = -1,
	constant_c = 2,
};

static void is_signed_type_test(struct kunit *test)
{
	KUNIT_EXPECT_EQ(test, is_signed_type(bool), false);
	KUNIT_EXPECT_EQ(test, is_signed_type(signed char), true);
	KUNIT_EXPECT_EQ(test, is_signed_type(unsigned char), false);
	KUNIT_EXPECT_EQ(test, is_signed_type(char), false);
	KUNIT_EXPECT_EQ(test, is_signed_type(int), true);
	KUNIT_EXPECT_EQ(test, is_signed_type(unsigned int), false);
	KUNIT_EXPECT_EQ(test, is_signed_type(long), true);
	KUNIT_EXPECT_EQ(test, is_signed_type(unsigned long), false);
	KUNIT_EXPECT_EQ(test, is_signed_type(long long), true);
	KUNIT_EXPECT_EQ(test, is_signed_type(unsigned long long), false);
	KUNIT_EXPECT_EQ(test, is_signed_type(enum unsigned_enum), false);
	KUNIT_EXPECT_EQ(test, is_signed_type(enum signed_enum), true);
	KUNIT_EXPECT_EQ(test, is_signed_type(void *), false);
	KUNIT_EXPECT_EQ(test, is_signed_type(const char *), false);
}

static struct kunit_case is_signed_type_test_cases[] = {
	KUNIT_CASE(is_signed_type_test),
	{}
};

static struct kunit_suite is_signed_type_test_suite = {
	.name = "is_signed_type",
	.test_cases = is_signed_type_test_cases,
};

kunit_test_suite(is_signed_type_test_suite);

MODULE_DESCRIPTION("is_signed_type() KUnit test suite");
MODULE_LICENSE("Dual MIT/GPL");

Annotation

• Immediate include surface: `kunit/test.h`, `linux/compiler.h`.
• Detected declarations: `enum unsigned_enum`, `enum signed_enum`, `function is_signed_type_test`.
• Atlas domain: Kernel Services / lib.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.