From c267ef7306fe9fc1399833e3556cd9798dec2eb0 Mon Sep 17 00:00:00 2001 From: Mark Adler Date: Mon, 5 Jan 2026 01:15:38 -0600 Subject: Use atomics to build inflate fixed tables once. This moves the once code from crc32.c to zutil.c, and uses it also for building the inflate fixed tables when BUILDFIXED is defined. The fixed tables are now housed in inftrees.c, shared by inflate.c and infback.c. The once() function is now external, and so is renamed to z_once() to avoid name collisions. If either BUILDFIXED or DYNAMIC_CRC_TABLE is defined, and atomics are not available, then a warning is issued noting that zlib is not thread-safe. --- README | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'README') diff --git a/README b/README index 02259d4..17b70fc 100644 --- a/README +++ b/README @@ -1,8 +1,8 @@ ZLIB DATA COMPRESSION LIBRARY zlib 1.3.1.2 is a general purpose data compression library. All the code is -thread safe. The data format used by the zlib library is described by RFCs -(Request for Comments) 1950 to 1952 at +thread safe (though see the FAQ for caveats). The data format used by the zlib +library is described by RFCs (Request for Comments) 1950 to 1952 at https://datatracker.ietf.org/doc/html/rfc1950 (zlib format), rfc1951 (deflate format) and rfc1952 (gzip format). -- cgit v1.2.3-55-g6feb