Function BufFileFlush

src/backend/storage/file/buffile.c:884–907

* BufFileFlush * * Like fflush(), except that I/O errors are reported with ereport(). */

 * Like fflush(), except that I/O errors are reported with ereport().
 */
static void
BufFileFlush(BufFile *file)
{
	switch (file->state)
	{
		case BFS_RANDOM_ACCESS:
		case BFS_SEQUENTIAL_WRITING:
			break;

		case BFS_COMPRESSED_WRITING:
			BufFileEndCompression(file);
			break;

		case BFS_SEQUENTIAL_READING:
		case BFS_COMPRESSED_READING:
			/* no-op. */
			return;
	}

	if (file->dirty)
		BufFileDumpBuffer(file);

	Assert(!file->dirty);
}

/*
 * BufFileSeek