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a3fdf78478
Re-work string_stream so that it is not tied to a struct kunit. This is
to allow using it for the log of struct kunit_suite.
Instead of resource-managing individual allocations the whole string_stream
can be resource-managed, if required.
alloc_string_stream() now allocates a string stream that is
not resource-managed.
string_stream_destroy() now works on an unmanaged string_stream
allocated by alloc_string_stream() and frees the entire
string_stream (previously it only freed the fragments).
string_stream_clear() has been made public for callers that
want to free the fragments without destroying the string_stream.
For resource-managed allocations use kunit_alloc_string_stream()
and kunit_free_string_stream().
In addition to this, string_stream_get_string() now returns an
unmanaged buffer that the caller must kfree().
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* C++ stream style string builder used in KUnit for building messages.
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*
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* Copyright (C) 2019, Google LLC.
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* Author: Brendan Higgins <brendanhiggins@google.com>
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*/
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#ifndef _KUNIT_STRING_STREAM_H
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#define _KUNIT_STRING_STREAM_H
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/stdarg.h>
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struct string_stream_fragment {
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struct list_head node;
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char *fragment;
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};
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struct string_stream {
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size_t length;
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struct list_head fragments;
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/* length and fragments are protected by this lock */
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spinlock_t lock;
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gfp_t gfp;
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bool append_newlines;
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};
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struct kunit;
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struct string_stream *kunit_alloc_string_stream(struct kunit *test, gfp_t gfp);
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void kunit_free_string_stream(struct kunit *test, struct string_stream *stream);
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struct string_stream *alloc_string_stream(gfp_t gfp);
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void free_string_stream(struct string_stream *stream);
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int __printf(2, 3) string_stream_add(struct string_stream *stream,
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const char *fmt, ...);
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int __printf(2, 0) string_stream_vadd(struct string_stream *stream,
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const char *fmt,
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va_list args);
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void string_stream_clear(struct string_stream *stream);
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char *string_stream_get_string(struct string_stream *stream);
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int string_stream_append(struct string_stream *stream,
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struct string_stream *other);
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bool string_stream_is_empty(struct string_stream *stream);
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void string_stream_destroy(struct string_stream *stream);
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static inline void string_stream_set_append_newlines(struct string_stream *stream,
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bool append_newlines)
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{
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stream->append_newlines = append_newlines;
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}
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#endif /* _KUNIT_STRING_STREAM_H */
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