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-rw-r--r--CMakeLists.txt144
1 files changed, 104 insertions, 40 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d936667f..44be745a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -178,37 +178,6 @@ if(NOT WIN32 AND NOT DEFINED HAVE_CLOCK_GETTIME)
endif()
endif()
-
-#############
-# Threading #
-#############
-
-set(THREADS_PREFER_PTHREAD_FLAG TRUE)
-find_package(Threads REQUIRED)
-if(CMAKE_USE_WIN32_THREADS_INIT)
- if(CMAKE_SIZEOF_VOID_P EQUAL 4)
- # Define to 1 when using Windows 95 (and thus XP) compatible threads. This
- # avoids use of features that were added in Windows Vista.
- # This is used for 32-bit x86 builds for compatibility reasons since it
- # makes no measurable difference in performance compared to Vista threads.
- add_compile_definitions(MYTHREAD_WIN95)
- else()
- # Define to 1 when using Windows Vista compatible threads. This uses features
- # that are not available on Windows XP.
- add_compile_definitions(MYTHREAD_VISTA)
- endif()
-else()
- add_compile_definitions(MYTHREAD_POSIX)
-
- # Check if pthread_condattr_setclock() exists to use CLOCK_MONOTONIC.
- if(HAVE_CLOCK_MONOTONIC)
- list(INSERT CMAKE_REQUIRED_LIBRARIES 0 "${CMAKE_THREAD_LIBS_INIT}")
- check_symbol_exists(pthread_condattr_setclock pthread.h
- HAVE_PTHREAD_CONDATTR_SETCLOCK)
- tuklib_add_definition_if(ALL HAVE_PTHREAD_CONDATTR_SETCLOCK)
- endif()
-endif()
-
# Options for new enough GCC or Clang on any arch or operating system:
if(CMAKE_C_COMPILER_ID MATCHES GNU|Clang)
# configure.ac has a long list but it won't be copied here:
@@ -227,8 +196,6 @@ add_library(liblzma
src/common/sysdefs.h
src/common/tuklib_common.h
src/common/tuklib_config.h
- src/common/tuklib_cpucores.c
- src/common/tuklib_cpucores.h
src/common/tuklib_integer.h
src/common/tuklib_physmem.c
src/common/tuklib_physmem.h
@@ -257,13 +224,10 @@ add_library(liblzma
src/liblzma/common/easy_preset.h
src/liblzma/common/filter_common.c
src/liblzma/common/filter_common.h
- src/liblzma/common/hardware_cputhreads.c
src/liblzma/common/hardware_physmem.c
src/liblzma/common/index.c
src/liblzma/common/index.h
src/liblzma/common/memcmplen.h
- src/liblzma/common/outqueue.c
- src/liblzma/common/outqueue.h
src/liblzma/common/stream_flags_common.c
src/liblzma/common/stream_flags_common.h
src/liblzma/common/string_conversion.c
@@ -361,6 +325,98 @@ foreach(MF IN LISTS MATCH_FINDERS)
endforeach()
+#############
+# Threading #
+#############
+
+# Supported thread methods:
+# ON - autodetect the best threading method. The autodetection will
+# prefer Windows threading (win95 or vista) over posix if both are
+# available. vista threads will be used over win95 unless it is a
+# 32-bit build.
+# OFF - Disable threading.
+# posix - Use posix threading, or throw an error if not available.
+# win95 - Use Windows win95 threading, or throw an error if not available.
+# vista - Use Windows vista threading, or throw an error if not available.
+set(SUPPORTED_THREAD_METHODS ON OFF posix win95 vista)
+
+set(ENABLE_THREADS ON CACHE STRING
+ "Threading method type to support. Set to 'OFF' to disable threading")
+
+# Create dropdown in CMake GUI since only 1 threading method is possible
+# to select in a build.
+set_property(CACHE ENABLE_THREADS
+ PROPERTY STRINGS "${SUPPORTED_THREAD_METHODS}")
+
+if(NOT ENABLE_THREADS IN_LIST SUPPORTED_THREAD_METHODS)
+ message(SEND_ERROR "'${ENABLE_THREADS}' is not a supported thread type")
+endif()
+
+if(ENABLE_THREADS)
+ # Also set THREADS_PREFER_PTHREAD_FLAG since the flag has no effect
+ # for Windows threading.
+ set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+ find_package(Threads REQUIRED)
+
+ # If both Windows and posix threading are available, prefer Windows.
+ if(CMAKE_USE_WIN32_THREADS_INIT AND NOT ENABLE_THREADS STREQUAL "posix")
+ if(ENABLE_THREADS STREQUAL "win95"
+ OR (ENABLE_THREADS STREQUAL "ON"
+ AND CMAKE_SIZEOF_VOID_P EQUAL 4))
+ # Use Windows 95 (and thus XP) compatible threads.
+ # This avoids use of features that were added in
+ # Windows Vista. This is used for 32-bit x86 builds for
+ # compatibility reasons since it makes no measurable difference
+ # in performance compared to Vista threads.
+ #
+ # The Win95 threading lacks thread-safe one-time initialization
+ # function.
+ if (ENABLE_SMALL)
+ message(SEND_ERROR "Threading method win95 and ENABLE_SMALL "
+ "cannot be used at the same time")
+ endif()
+
+ add_compile_definitions(MYTHREAD_WIN95)
+ else()
+ add_compile_definitions(MYTHREAD_VISTA)
+ endif()
+ elseif(CMAKE_USE_PTHREADS_INIT)
+ if(ENABLE_THREADS STREQUAL "posix" OR ENABLE_THREADS STREQUAL "ON")
+ # Overwrite ENABLE_THREADS in case it was set to "ON".
+ # The threading library only needs to be explicitly linked
+ # for posix threads, so this is needed for creating
+ # liblzma-config.cmake later.
+ set(ENABLE_THREADS "posix")
+
+ target_link_libraries(liblzma Threads::Threads)
+ add_compile_definitions(MYTHREAD_POSIX)
+
+ # Check if pthread_condattr_setclock() exists to use CLOCK_MONOTONIC.
+ if(HAVE_CLOCK_MONOTONIC)
+ list(INSERT CMAKE_REQUIRED_LIBRARIES 0 "${CMAKE_THREAD_LIBS_INIT}")
+ check_symbol_exists(pthread_condattr_setclock pthread.h
+ HAVE_PTHREAD_CONDATTR_SETCLOCK)
+ tuklib_add_definition_if(ALL HAVE_PTHREAD_CONDATTR_SETCLOCK)
+ endif()
+ else()
+ message(SEND_ERROR
+ "Windows thread method requested, but a compatible "
+ "library could not be found")
+ endif()
+ else()
+ message(SEND_ERROR "No supported threading library found")
+ endif()
+
+ target_sources(liblzma PRIVATE
+ src/common/tuklib_cpucores.c
+ src/common/tuklib_cpucores.h
+ src/liblzma/common/hardware_cputhreads.c
+ src/liblzma/common/outqueue.c
+ src/liblzma/common/outqueue.h
+ )
+endif()
+
+
############
# Encoders #
############
@@ -438,11 +494,16 @@ if(HAVE_ENCODERS)
src/liblzma/common/index_encoder.h
src/liblzma/common/stream_buffer_encoder.c
src/liblzma/common/stream_encoder.c
- src/liblzma/common/stream_encoder_mt.c
src/liblzma/common/stream_flags_encoder.c
src/liblzma/common/vli_encoder.c
)
+ if(ENABLE_THREADS)
+ target_sources(liblzma PRIVATE
+ src/liblzma/common/stream_encoder_mt.c
+ )
+ endif()
+
if(SIMPLE_ENCODERS)
target_sources(liblzma PRIVATE
src/liblzma/simple/simple_encoder.c
@@ -537,11 +598,16 @@ if(HAVE_DECODERS)
src/liblzma/common/stream_buffer_decoder.c
src/liblzma/common/stream_decoder.c
src/liblzma/common/stream_flags_decoder.c
- src/liblzma/common/stream_decoder_mt.c
src/liblzma/common/stream_decoder.h
src/liblzma/common/vli_decoder.c
)
+ if(ENABLE_THREADS)
+ target_sources(liblzma PRIVATE
+ src/liblzma/common/stream_decoder_mt.c
+ )
+ endif()
+
if(SIMPLE_DECODERS)
target_sources(liblzma PRIVATE
src/liblzma/simple/simple_decoder.c
@@ -660,8 +726,6 @@ endif()
###
-target_link_libraries(liblzma Threads::Threads)
-
# Put the tuklib functions under the lzma_ namespace.
target_compile_definitions(liblzma PRIVATE TUKLIB_SYMBOL_PREFIX=lzma_)
tuklib_cpucores(liblzma)