support building vp8 and vp9 into a single lib

Change-Id: Ib8f8a66c9fd31e508cdc9caa662192f38433aa3d

build/make/Makefile

@@ -105,14 +105,14 @@ testdata::
 
 xform_obj_prefix:=.objs/$(TOOLCHAIN)/
 xform_obj_path=$(if $(1),$(addprefix $(xform_obj_prefix),$(subst /,_,$(1))),$(xform_obj_prefix))
-xform_obj_path_o_d=$(call xform_obj_path,$(1).o) $(call xform_obj_path,$(1).d)
+xform_obj_path_o_d=$(call xform_obj_path,$(1)).o $(call xform_obj_path,$(1)).d
 define obj_rules_template
 $(BUILD_PFX)$(call xform_obj_path,$(1))%.c.d: $(1)%.c
 	$(if $(quiet),@echo "    [DEP] $$@")
 	$(qexec)mkdir -p $$(dir $$@)
 	$(qexec)$(CC) $$(INTERNAL_CFLAGS) $$(CFLAGS) -M $$< | $(fmt_deps) > $$@
 
-$(BUILD_PFX)$(call xform_obj_path,$(1))%.c.o: $(1)%.c
+$(BUILD_PFX)$(call xform_obj_path,$(1))%.c.o: $(1)%.c $(BUILD_PFX)$(call xform_obj_path,$(1))%.c.d
 	$(if $(quiet),@echo "    [CC] $$@")
 	$(qexec)$(CC) $$(INTERNAL_CFLAGS) $$(CFLAGS) -c -o $$@ $$<
 

build/make/gen_msvs_proj.sh

@@ -143,7 +143,9 @@ generate_filter() {
             if [ "${f##*.}" == "$pat" ]; then
                 unset file_list[i]
 
+                objf=$(echo ${f%.*}.obj | sed -e 's/^[\./]\+//g' -e 's,/,_,g')
                 open_tag File RelativePath="./$f"
+
                 if [ "$pat" == "asm" ] && $asm_use_custom_step; then
                     for plat in "${platforms[@]}"; do
                         for cfg in Debug Release; do
@@ -154,13 +156,26 @@ generate_filter() {
                                 Name="VCCustomBuildTool" \
                                 Description="Assembling \$(InputFileName)" \
                                 CommandLine="$(eval echo \$asm_${cfg}_cmdline)" \
-                                Outputs="\$(InputName).obj" \
+                                Outputs="\$(IntDir)$objf" \
 
                             close_tag FileConfiguration
                         done
                     done
                 fi
+                if [ "$pat" == "c" ] || [ "$pat" == "cc" ] ; then
+                    for plat in "${platforms[@]}"; do
+                        for cfg in Debug Release; do
+                            open_tag FileConfiguration \
+                                Name="${cfg}|${plat}" \
 
+                            tag Tool \
+                                Name="VCCLCompilerTool" \
+                                ObjectFile="\$(IntDir)$objf" \
+
+                            close_tag FileConfiguration
+                        done
+                    done
+                fi
                 close_tag File
 
                 break

build/x86-msvs/obj_int_extract.bat

@@ -13,3 +13,11 @@ cl /I "./" /I "%1" /nologo /c "%1/vp9/encoder/asm_enc_offsets.c"
 obj_int_extract.exe rvds "asm_com_offsets.obj" > "vp9_asm_com_offsets.asm"
 obj_int_extract.exe rvds "asm_dec_offsets.obj" > "vp9_asm_dec_offsets.asm"
 obj_int_extract.exe rvds "asm_enc_offsets.obj" > "vp9_asm_enc_offsets.asm"
+
+cl /I "./" /I "%1" /nologo /c "%1/vp8/common/asm_com_offsets.c"
+cl /I "./" /I "%1" /nologo /c "%1/vp8/decoder/asm_dec_offsets.c"
+cl /I "./" /I "%1" /nologo /c "%1/vp8/encoder/asm_enc_offsets.c"
+obj_int_extract.exe rvds "asm_com_offsets.obj" > "vp8_asm_com_offsets.asm"
+obj_int_extract.exe rvds "asm_dec_offsets.obj" > "vp8_asm_dec_offsets.asm"
+obj_int_extract.exe rvds "asm_enc_offsets.obj" > "vp8_asm_enc_offsets.asm"
+

examples.mk

@@ -38,7 +38,7 @@ vpxenc.SRCS                 += libmkv/EbmlWriter.c
 vpxenc.SRCS                 += libmkv/EbmlWriter.h
 vpxenc.GUID                  = 548DEC74-7A15-4B2B-AFC3-AA102E7C25C1
 vpxenc.DESCRIPTION           = Full featured encoder
-UTILS-$(CONFIG_ENCODERS)    += vp8_scalable_patterns.c
+UTILS-$(CONFIG_VP8_ENCODER)    += vp8_scalable_patterns.c
 vp8_scalable_patterns.GUID   = 0D6A210B-F482-4D6F-8570-4A9C01ACC88C
 vp8_scalable_patterns.DESCRIPTION = Temporal Scalability Encoder
 
@@ -56,37 +56,37 @@ endif
 #example_xma.GUID             = A955FC4A-73F1-44F7-135E-30D84D32F022
 #example_xma.DESCRIPTION      = External Memory Allocation mode usage
 
-GEN_EXAMPLES-$(CONFIG_DECODERS) += simple_decoder.c
+GEN_EXAMPLES-$(CONFIG_VP8_DECODER) += simple_decoder.c
 simple_decoder.GUID              = D3BBF1E9-2427-450D-BBFF-B2843C1D44CC
 simple_decoder.DESCRIPTION       = Simplified decoder loop
-GEN_EXAMPLES-$(CONFIG_DECODERS) += postproc.c
+GEN_EXAMPLES-$(CONFIG_VP8_DECODER) += postproc.c
 postproc.GUID                    = 65E33355-F35E-4088-884D-3FD4905881D7
 postproc.DESCRIPTION             = Decoder postprocessor control
-GEN_EXAMPLES-$(CONFIG_DECODERS) += decode_to_md5.c
+GEN_EXAMPLES-$(CONFIG_VP8_DECODER) += decode_to_md5.c
 decode_to_md5.SRCS              += md5_utils.h md5_utils.c
 decode_to_md5.GUID               = 59120B9B-2735-4BFE-B022-146CA340FE42
 decode_to_md5.DESCRIPTION        = Frame by frame MD5 checksum
 
-GEN_EXAMPLES-$(CONFIG_ENCODERS) += simple_encoder.c
+GEN_EXAMPLES-$(CONFIG_VP8_ENCODER) += simple_encoder.c
 simple_encoder.GUID              = 4607D299-8A71-4D2C-9B1D-071899B6FBFD
 simple_encoder.DESCRIPTION       = Simplified encoder loop
-GEN_EXAMPLES-$(CONFIG_ENCODERS) += twopass_encoder.c
+GEN_EXAMPLES-$(CONFIG_VP8_ENCODER) += twopass_encoder.c
 twopass_encoder.GUID             = 73494FA6-4AF9-4763-8FBB-265C92402FD8
 twopass_encoder.DESCRIPTION      = Two-pass encoder loop
-GEN_EXAMPLES-$(CONFIG_ENCODERS) += force_keyframe.c
+GEN_EXAMPLES-$(CONFIG_VP8_ENCODER) += force_keyframe.c
 force_keyframe.GUID              = 3C67CADF-029F-4C86-81F5-D6D4F51177F0
 force_keyframe.DESCRIPTION       = Force generation of keyframes
 ifeq ($(CONFIG_DECODERS),yes)
-GEN_EXAMPLES-$(CONFIG_ENCODERS) += decode_with_drops.c
+GEN_EXAMPLES-$(CONFIG_VP8_ENCODER) += decode_with_drops.c
 endif
 decode_with_drops.GUID           = CE5C53C4-8DDA-438A-86ED-0DDD3CDB8D26
 decode_with_drops.DESCRIPTION    = Drops frames while decoding
-ifeq ($(CONFIG_DECODERS),yes)
+ifeq ($(CONFIG_VP8_DECODER),yes)
 GEN_EXAMPLES-$(CONFIG_ERROR_CONCEALMENT) += decode_with_partial_drops.c
 endif
 decode_with_partial_drops.GUID           = 61C2D026-5754-46AC-916F-1343ECC5537E
 decode_with_partial_drops.DESCRIPTION    = Drops parts of frames while decoding
-GEN_EXAMPLES-$(CONFIG_ENCODERS) += error_resilient.c
+GEN_EXAMPLES-$(CONFIG_VP8_ENCODER) += error_resilient.c
 error_resilient.GUID             = DF5837B9-4145-4F92-A031-44E4F832E00C
 error_resilient.DESCRIPTION      = Error Resiliency Feature
 

libs.mk

@@ -44,6 +44,19 @@ endef
 endif # rvct
 endif # !gcc
 
+#
+# Rule to generate runtime cpu detection files
+#
+define rtcd_h_template
+$$(BUILD_PFX)$(1).h: $$(SRC_PATH_BARE)/$(2)
+	@echo "    [CREATE] $$@"
+	$$(qexec)$$(SRC_PATH_BARE)/build/make/rtcd.sh --arch=$$(TGT_ISA) \
+          --sym=$(1) \
+          --config=$$(target)$$(if $$(FAT_ARCHS),,-$$(TOOLCHAIN)).mk \
+          $$(RTCD_OPTIONS) $$^ > $$@
+CLEAN-OBJS += $$(BUILD_PFX)$(1).h
+RTCD += $$(BUILD_PFX)$(1).h
+endef
 
 CODEC_SRCS-yes += CHANGELOG
 CODEC_SRCS-yes += libs.mk
@@ -190,7 +203,8 @@ INSTALL-LIBS-$(CONFIG_STATIC) += $(LIBSUBDIR)/libvpx.a
 INSTALL-LIBS-$(CONFIG_DEBUG_LIBS) += $(LIBSUBDIR)/libvpx_g.a
 endif
 
-CODEC_SRCS=$(filter-out %_test.cc,$(call enabled,CODEC_SRCS))
+CODEC_SRCS=$(filter-out %_offsets.c,\
+           $(filter-out %_test.cc,$(call enabled,CODEC_SRCS)))
 INSTALL-SRCS-$(CONFIG_CODEC_SRCS) += $(CODEC_SRCS)
 INSTALL-SRCS-$(CONFIG_CODEC_SRCS) += $(call enabled,CODEC_EXPORTS)
 
@@ -245,7 +259,7 @@ vpx.vcproj: $(CODEC_SRCS) vpx.def
 PROJECTS-$(BUILD_LIBVPX) += vpx.vcproj
 
 vpx.vcproj: vpx_config.asm
-vpx.vcproj: vpx_rtcd.h
+vpx.vcproj: $(RTCD)
 
 endif
 else
@@ -362,18 +376,6 @@ $(filter %$(ASM).o,$(OBJS-yes)): $(BUILD_PFX)vpx_config.asm
 $(shell $(SRC_PATH_BARE)/build/make/version.sh "$(SRC_PATH_BARE)" $(BUILD_PFX)vpx_version.h)
 CLEAN-OBJS += $(BUILD_PFX)vpx_version.h
 
-#
-# Rule to generate runtime cpu detection files
-#
-$(BUILD_PFX)vpx_rtcd.h: $(SRC_PATH_BARE)/$(sort $(filter %rtcd_defs.sh,$(CODEC_SRCS)))
-	@echo "    [CREATE] $@"
-	$(qexec)$(SRC_PATH_BARE)/build/make/rtcd.sh --arch=$(TGT_ISA) \
-          --sym=vpx_rtcd \
-          --config=$(target)$(if $(FAT_ARCHS),,-$(TOOLCHAIN)).mk \
-          $(RTCD_OPTIONS) $^ > $@
-CLEAN-OBJS += $(BUILD_PFX)vpx_rtcd.h
-
-
 CODEC_DOC_SRCS += vpx/vpx_codec.h \
                   vpx/vpx_decoder.h \
                   vpx/vpx_encoder.h \
@@ -501,8 +503,8 @@ libs.doxy: $(CODEC_DOC_SRCS)
 	@echo "INCLUDE_PATH += ." >> $@;
 	@echo "ENABLED_SECTIONS += $(sort $(CODEC_DOC_SECTIONS))" >> $@
 
-## Generate vpx_rtcd.h for all objects
-$(OBJS-yes:.o=.d): $(BUILD_PFX)vpx_rtcd.h
+## Generate rtcd.h for all objects
+$(OBJS-yes:.o=.d): $(RTCD)
 
 ## Update the global src list
 SRCS += $(CODEC_SRCS) $(LIBVPX_TEST_SRCS) $(GTEST_SRCS)

test/dct16x16_test.cc

@@ -17,7 +17,7 @@
 extern "C" {
 #include "vp9/common/entropy.h"
 #include "vp9/common/idct.h"
-#include "vpx_rtcd.h"
+#include "vp9_rtcd.h"
 }
 
 #include "acm_random.h"

test/fdct4x4_test.cc

@@ -16,7 +16,7 @@
 
 extern "C" {
 #include "vp9/common/idct.h"
-#include "vpx_rtcd.h"
+#include "vp9_rtcd.h"
 }
 
 #include "acm_random.h"

test/fdct8x8_test.cc

@@ -16,7 +16,7 @@
 
 extern "C" {
 #include "vp9/common/idct.h"
-#include "vpx_rtcd.h"
+#include "vp9_rtcd.h"
 }
 
 #include "acm_random.h"

test/idct8x8_test.cc

@@ -16,7 +16,7 @@
 
 extern "C" {
 #include "vp9/common/idct.h"
-#include "vpx_rtcd.h"
+#include "vp9_rtcd.h"
 }
 
 #include "acm_random.h"

test/idctllm_test.cc

@@ -11,7 +11,7 @@
 
 extern "C" {
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 }
 #include "third_party/googletest/src/include/gtest/gtest.h"
 

test/intrapred_test.cc

@@ -14,7 +14,7 @@
 #include "third_party/googletest/src/include/gtest/gtest.h"
 extern "C" {
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vp8/common/blockd.h"
 #include "vpx_mem/vpx_mem.h"
 }

test/pp_filter_test.cc

@@ -10,7 +10,7 @@
 #include "third_party/googletest/src/include/gtest/gtest.h"
 extern "C" {
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vpx/vpx_integer.h"
 #include "vpx_mem/vpx_mem.h"
 }

test/sad_test.cc

@@ -15,7 +15,7 @@
 
 extern "C" {
 #include "./vpx_config.h"
-#include "./vpx_rtcd.h"
+#include "./vp8_rtcd.h"
 #include "vp8/common/blockd.h"
 #include "vpx_mem/vpx_mem.h"
 }

test/sixtap_predict_test.cc

@@ -16,7 +16,7 @@
 #include "third_party/googletest/src/include/gtest/gtest.h"
 extern "C" {
 #include "./vpx_config.h"
-#include "./vpx_rtcd.h"
+#include "./vp8_rtcd.h"
 #include "vpx/vpx_integer.h"
 #include "vpx_mem/vpx_mem.h"
 }

test/subtract_test.cc

@@ -12,7 +12,7 @@
 #include "test/acm_random.h"
 extern "C" {
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vp8/common/blockd.h"
 #include "vp8/encoder/block.h"
 #include "vpx_mem/vpx_mem.h"

test/variance_test.cc

@@ -16,7 +16,7 @@
 extern "C" {
 #include "vp9/encoder/variance.h"
 #include "vpx/vpx_integer.h"
-#include "vpx_rtcd.h"
+#include "vp9_rtcd.h"
 }
 
 namespace {

test/vp8_fdct4x4_test.cc

@@ -18,7 +18,7 @@
 
 
 extern "C" {
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 }
 
 #include "test/acm_random.h"

tools/all_builds.py

@@ -5,7 +5,7 @@ import subprocess
 import sys
 
 LONG_OPTIONS = ["shard=", "shards="]
-BASE_COMMAND = "./configure --disable-vp8 --disable-unit-tests --enable-internal-stats --enable-experimental"
+BASE_COMMAND = "./configure --enable-internal-stats --enable-experimental"
 
 def RunCommand(command):
   run = subprocess.Popen(command, shell=True)

vp8/common/arm/armv6/idct_blk_v6.c

@@ -9,7 +9,7 @@
  */
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 
 
 void vp8_dequant_idct_add_y_block_v6(short *q, short *dq,

vp8/common/arm/bilinearfilter_arm.c

@@ -9,7 +9,7 @@
  */
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include <math.h>
 #include "vp8/common/filter.h"
 #include "bilinearfilter_arm.h"

vp8/common/arm/filter_arm.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include <math.h>
 #include "vp8/common/filter.h"
 #include "vpx_ports/mem.h"

vp8/common/arm/loopfilter_arm.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vp8/common/loopfilter.h"
 #include "vp8/common/onyxc_int.h"
 

vp8/common/arm/neon/idct_blk_neon.c

@@ -9,7 +9,7 @@
  */
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 
 /* place these declarations here because we don't want to maintain them
  * outside of this scope

vp8/common/arm/reconintra_arm.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vp8/common/blockd.h"
 #include "vpx_mem/vpx_mem.h"
 

vp8/common/arm/variance_arm.c

@@ -9,7 +9,7 @@
  */
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vp8/common/variance.h"
 #include "vp8/common/filter.h"
 

vp8/common/dequantize.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vp8/common/blockd.h"
 #include "vpx_mem/vpx_mem.h"
 

vp8/common/generic/systemdependent.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #if ARCH_ARM
 #include "vpx_ports/arm.h"
 #elif ARCH_X86 || ARCH_X86_64

vp8/common/idct_blk.c

@@ -9,7 +9,7 @@
  */
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 
 void vp8_dequant_idct_add_c(short *input, short *dq,
                             unsigned char *dest, int stride);

vp8/common/invtrans.h

@@ -13,7 +13,7 @@
 #define __INC_INVTRANS_H
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "blockd.h"
 #include "onyxc_int.h"
 

vp8/common/loopfilter.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "loopfilter.h"
 #include "onyxc_int.h"
 #include "vpx_mem/vpx_mem.h"

vp8/common/loopfilter.h

@@ -14,7 +14,7 @@
 
 #include "vpx_ports/mem.h"
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 
 #define MAX_LOOP_FILTER             63
 /* fraction of total macroblock rows to be used in fast filter level picking */

vp8/common/mfqe.c

@@ -20,7 +20,7 @@
 #include "postproc.h"
 #include "variance.h"
 #include "vpx_mem/vpx_mem.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vpx_scale/yv12config.h"
 
 #include <limits.h>

vp8/common/mips/dspr2/dequantize_dspr2.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vpx_mem/vpx_mem.h"
 
 #if HAVE_DSPR2

vp8/common/mips/dspr2/filter_dspr2.c

@@ -10,7 +10,7 @@
 
 
 #include <stdlib.h>
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vpx_ports/mem.h"
 
 #if HAVE_DSPR2

vp8/common/mips/dspr2/idct_blk_dspr2.c

@@ -9,7 +9,7 @@
  */
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 
 #if HAVE_DSPR2
 

vp8/common/mips/dspr2/idctllm_dspr2.c

@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 
 #if HAVE_DSPR2
 #define CROP_WIDTH 256

vp8/common/mips/dspr2/loopfilter_filters_dspr2.c

@@ -10,7 +10,7 @@
 
 
 #include <stdlib.h>
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vp8/common/onyxc_int.h"
 
 #if HAVE_DSPR2

vp8/common/mips/dspr2/reconinter_dspr2.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vpx/vpx_integer.h"
 
 #if HAVE_DSPR2

vp8/common/onyxc_int.h

@@ -13,7 +13,7 @@
 #define __INC_VP8C_INT_H
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vpx/internal/vpx_codec_internal.h"
 #include "loopfilter.h"
 #include "entropymv.h"

vp8/common/postproc.c

@@ -10,7 +10,8 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
+#include "vpx_scale_rtcd.h"
 #include "vpx_scale/yv12config.h"
 #include "postproc.h"
 #include "common.h"

vp8/common/reconinter.c

@@ -11,7 +11,7 @@
 
 #include <limits.h>
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vpx/vpx_integer.h"
 #include "blockd.h"
 #include "reconinter.h"

vp8/common/reconintra.c

@@ -10,7 +10,7 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "vpx_mem/vpx_mem.h"
 #include "blockd.h"
 

vp8/common/reconintra4x4.c

@@ -10,17 +10,17 @@
 
 
 #include "vpx_config.h"
-#include "vpx_rtcd.h"
+#include "vp8_rtcd.h"
 #include "blockd.h"
 
 void vp8_intra4x4_predict_c(unsigned char *Above,
                             unsigned char *yleft, int left_stride,
-                            B_PREDICTION_MODE b_mode,
+                            int           _b_mode,
                             unsigned char *dst, int dst_stride,
                             unsigned char top_left)
 {
     int i, r, c;
-
+    B_PREDICTION_MODE b_mode = (B_PREDICTION_MODE)_b_mode;
     unsigned char Left[4];
     Left[0] = yleft[0];
     Left[1] = yleft[left_stride];

vp8/common/rtcd.c

@@ -9,97 +9,13 @@
  */
 #include "vpx_config.h"
 #define RTCD_C
-#include "vpx_rtcd.h"
-
-#if CONFIG_MULTITHREAD && defined(_WIN32)
-#include <windows.h>
-#include <stdlib.h>
-static void once(void (*func)(void))
-{
-    static CRITICAL_SECTION *lock;
-    static LONG waiters;
-    static int done;
-    void *lock_ptr = &lock;
-
-    /* If the initialization is complete, return early. This isn't just an
-     * optimization, it prevents races on the destruction of the global
-     * lock.
-     */
-    if(done)
-        return;
-
-    InterlockedIncrement(&waiters);
-
-    /* Get a lock. We create one and try to make it the one-true-lock,
-     * throwing it away if we lost the race.
-     */
-
-    {
-        /* Scope to protect access to new_lock */
-        CRITICAL_SECTION *new_lock = malloc(sizeof(CRITICAL_SECTION));
-        InitializeCriticalSection(new_lock);
-        if (InterlockedCompareExchangePointer(lock_ptr, new_lock, NULL) != NULL)
-        {
-            DeleteCriticalSection(new_lock);
-            free(new_lock);
-        }
-    }
-
-    /* At this point, we have a lock that can be synchronized on. We don't
-     * care which thread actually performed the allocation.
-     */
-
-    EnterCriticalSection(lock);
-
-    if (!done)
-    {
-        func();
-        done = 1;
-    }
-
-    LeaveCriticalSection(lock);
-
-    /* Last one out should free resources. The destructed objects are
-     * protected by checking if(done) above.
-     */
-    if(!InterlockedDecrement(&waiters))
-    {
-        DeleteCriticalSection(lock);