diff --git a/BUILD b/BUILD
index 5dcf3b282f6..9dc049fd288 100644
--- a/BUILD
+++ b/BUILD
@@ -98,6 +98,7 @@ GPR_PUBLIC_HDRS = [
     "include/grpc/support/port_platform.h",
     "include/grpc/support/string_util.h",
     "include/grpc/support/sync.h",
+    "include/grpc/support/sync_abseil.h",
     "include/grpc/support/sync_custom.h",
     "include/grpc/support/sync_generic.h",
     "include/grpc/support/sync_posix.h",
@@ -509,6 +510,7 @@ grpc_cc_library(
         "src/core/lib/gpr/string_util_windows.cc",
         "src/core/lib/gpr/string_windows.cc",
         "src/core/lib/gpr/sync.cc",
+        "src/core/lib/gpr/sync_abseil.cc",
         "src/core/lib/gpr/sync_posix.cc",
         "src/core/lib/gpr/sync_windows.cc",
         "src/core/lib/gpr/time.cc",
@@ -587,6 +589,7 @@ grpc_cc_library(
         "include/grpc/impl/codegen/log.h",
         "include/grpc/impl/codegen/port_platform.h",
         "include/grpc/impl/codegen/sync.h",
+        "include/grpc/impl/codegen/sync_abseil.h",
         "include/grpc/impl/codegen/sync_custom.h",
         "include/grpc/impl/codegen/sync_generic.h",
         "include/grpc/impl/codegen/sync_posix.h",
diff --git a/BUILD.gn b/BUILD.gn
index d0a9b061737..8dc1e1f1590 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -66,6 +66,7 @@ config("grpc_config") {
         "include/grpc/impl/codegen/log.h",
         "include/grpc/impl/codegen/port_platform.h",
         "include/grpc/impl/codegen/sync.h",
+        "include/grpc/impl/codegen/sync_abseil.h",
         "include/grpc/impl/codegen/sync_custom.h",
         "include/grpc/impl/codegen/sync_generic.h",
         "include/grpc/impl/codegen/sync_posix.h",
@@ -81,6 +82,7 @@ config("grpc_config") {
         "include/grpc/support/port_platform.h",
         "include/grpc/support/string_util.h",
         "include/grpc/support/sync.h",
+        "include/grpc/support/sync_abseil.h",
         "include/grpc/support/sync_custom.h",
         "include/grpc/support/sync_generic.h",
         "include/grpc/support/sync_posix.h",
@@ -114,6 +116,7 @@ config("grpc_config") {
         "src/core/lib/gpr/string_windows.cc",
         "src/core/lib/gpr/string_windows.h",
         "src/core/lib/gpr/sync.cc",
+        "src/core/lib/gpr/sync_abseil.cc",
         "src/core/lib/gpr/sync_posix.cc",
         "src/core/lib/gpr/sync_windows.cc",
         "src/core/lib/gpr/time.cc",
@@ -199,6 +202,7 @@ config("grpc_config") {
         "include/grpc/impl/codegen/slice.h",
         "include/grpc/impl/codegen/status.h",
         "include/grpc/impl/codegen/sync.h",
+        "include/grpc/impl/codegen/sync_abseil.h",
         "include/grpc/impl/codegen/sync_custom.h",
         "include/grpc/impl/codegen/sync_generic.h",
         "include/grpc/impl/codegen/sync_posix.h",
@@ -1051,6 +1055,7 @@ config("grpc_config") {
         "include/grpc/impl/codegen/slice.h",
         "include/grpc/impl/codegen/status.h",
         "include/grpc/impl/codegen/sync.h",
+        "include/grpc/impl/codegen/sync_abseil.h",
         "include/grpc/impl/codegen/sync_custom.h",
         "include/grpc/impl/codegen/sync_generic.h",
         "include/grpc/impl/codegen/sync_posix.h",
@@ -1070,6 +1075,7 @@ config("grpc_config") {
         "include/grpc/support/port_platform.h",
         "include/grpc/support/string_util.h",
         "include/grpc/support/sync.h",
+        "include/grpc/support/sync_abseil.h",
         "include/grpc/support/sync_custom.h",
         "include/grpc/support/sync_generic.h",
         "include/grpc/support/sync_posix.h",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9e93bf193f8..f9a15dd8289 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1286,6 +1286,7 @@ foreach(_hdr
   include/grpc/support/port_platform.h
   include/grpc/support/string_util.h
   include/grpc/support/sync.h
+  include/grpc/support/sync_abseil.h
   include/grpc/support/sync_custom.h
   include/grpc/support/sync_generic.h
   include/grpc/support/sync_posix.h
@@ -1302,6 +1303,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -1384,6 +1386,7 @@ add_library(gpr
   src/core/lib/gpr/string_util_windows.cc
   src/core/lib/gpr/string_windows.cc
   src/core/lib/gpr/sync.cc
+  src/core/lib/gpr/sync_abseil.cc
   src/core/lib/gpr/sync_posix.cc
   src/core/lib/gpr/sync_windows.cc
   src/core/lib/gpr/time.cc
@@ -1458,6 +1461,7 @@ foreach(_hdr
   include/grpc/support/port_platform.h
   include/grpc/support/string_util.h
   include/grpc/support/sync.h
+  include/grpc/support/sync_abseil.h
   include/grpc/support/sync_custom.h
   include/grpc/support/sync_generic.h
   include/grpc/support/sync_posix.h
@@ -1474,6 +1478,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -1942,6 +1947,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -2352,6 +2358,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -2686,6 +2693,7 @@ foreach(_hdr
   include/grpc/support/port_platform.h
   include/grpc/support/string_util.h
   include/grpc/support/sync.h
+  include/grpc/support/sync_abseil.h
   include/grpc/support/sync_custom.h
   include/grpc/support/sync_generic.h
   include/grpc/support/sync_posix.h
@@ -2702,6 +2710,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -3028,6 +3037,7 @@ foreach(_hdr
   include/grpc/support/port_platform.h
   include/grpc/support/string_util.h
   include/grpc/support/sync.h
+  include/grpc/support/sync_abseil.h
   include/grpc/support/sync_custom.h
   include/grpc/support/sync_generic.h
   include/grpc/support/sync_posix.h
@@ -3044,6 +3054,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -3436,6 +3447,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -3886,6 +3898,7 @@ foreach(_hdr
   include/grpc/support/port_platform.h
   include/grpc/support/string_util.h
   include/grpc/support/sync.h
+  include/grpc/support/sync_abseil.h
   include/grpc/support/sync_custom.h
   include/grpc/support/sync_generic.h
   include/grpc/support/sync_posix.h
@@ -3902,6 +3915,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -4585,6 +4599,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -4782,6 +4797,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
@@ -5018,6 +5034,7 @@ foreach(_hdr
   include/grpc/support/port_platform.h
   include/grpc/support/string_util.h
   include/grpc/support/sync.h
+  include/grpc/support/sync_abseil.h
   include/grpc/support/sync_custom.h
   include/grpc/support/sync_generic.h
   include/grpc/support/sync_posix.h
@@ -5034,6 +5051,7 @@ foreach(_hdr
   include/grpc/impl/codegen/log.h
   include/grpc/impl/codegen/port_platform.h
   include/grpc/impl/codegen/sync.h
+  include/grpc/impl/codegen/sync_abseil.h
   include/grpc/impl/codegen/sync_custom.h
   include/grpc/impl/codegen/sync_generic.h
   include/grpc/impl/codegen/sync_posix.h
diff --git a/Makefile b/Makefile
index c50372f1552..30384b57a98 100644
--- a/Makefile
+++ b/Makefile
@@ -3759,6 +3759,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/support/port_platform.h \
     include/grpc/support/string_util.h \
     include/grpc/support/sync.h \
+    include/grpc/support/sync_abseil.h \
     include/grpc/support/sync_custom.h \
     include/grpc/support/sync_generic.h \
     include/grpc/support/sync_posix.h \
@@ -3775,6 +3776,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -3882,6 +3884,7 @@ LIBGPR_SRC = \
     src/core/lib/gpr/string_util_windows.cc \
     src/core/lib/gpr/string_windows.cc \
     src/core/lib/gpr/sync.cc \
+    src/core/lib/gpr/sync_abseil.cc \
     src/core/lib/gpr/sync_posix.cc \
     src/core/lib/gpr/sync_windows.cc \
     src/core/lib/gpr/time.cc \
@@ -3915,6 +3918,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/support/port_platform.h \
     include/grpc/support/string_util.h \
     include/grpc/support/sync.h \
+    include/grpc/support/sync_abseil.h \
     include/grpc/support/sync_custom.h \
     include/grpc/support/sync_generic.h \
     include/grpc/support/sync_posix.h \
@@ -3931,6 +3935,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -4376,6 +4381,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -4778,6 +4784,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -5108,6 +5115,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/support/port_platform.h \
     include/grpc/support/string_util.h \
     include/grpc/support/sync.h \
+    include/grpc/support/sync_abseil.h \
     include/grpc/support/sync_custom.h \
     include/grpc/support/sync_generic.h \
     include/grpc/support/sync_posix.h \
@@ -5124,6 +5132,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -5436,6 +5445,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/support/port_platform.h \
     include/grpc/support/string_util.h \
     include/grpc/support/sync.h \
+    include/grpc/support/sync_abseil.h \
     include/grpc/support/sync_custom.h \
     include/grpc/support/sync_generic.h \
     include/grpc/support/sync_posix.h \
@@ -5452,6 +5462,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -5813,6 +5824,7 @@ PUBLIC_HEADERS_C += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -6230,6 +6242,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/support/port_platform.h \
     include/grpc/support/string_util.h \
     include/grpc/support/sync.h \
+    include/grpc/support/sync_abseil.h \
     include/grpc/support/sync_custom.h \
     include/grpc/support/sync_generic.h \
     include/grpc/support/sync_posix.h \
@@ -6246,6 +6259,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -6919,6 +6933,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -7099,6 +7114,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
@@ -7337,6 +7353,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/support/port_platform.h \
     include/grpc/support/string_util.h \
     include/grpc/support/sync.h \
+    include/grpc/support/sync_abseil.h \
     include/grpc/support/sync_custom.h \
     include/grpc/support/sync_generic.h \
     include/grpc/support/sync_posix.h \
@@ -7353,6 +7370,7 @@ PUBLIC_HEADERS_CXX += \
     include/grpc/impl/codegen/log.h \
     include/grpc/impl/codegen/port_platform.h \
     include/grpc/impl/codegen/sync.h \
+    include/grpc/impl/codegen/sync_abseil.h \
     include/grpc/impl/codegen/sync_custom.h \
     include/grpc/impl/codegen/sync_generic.h \
     include/grpc/impl/codegen/sync_posix.h \
diff --git a/build.yaml b/build.yaml
index 948f87a5c59..4a6de9e6ada 100644
--- a/build.yaml
+++ b/build.yaml
@@ -248,6 +248,7 @@ filegroups:
   - src/core/lib/gpr/string_util_windows.cc
   - src/core/lib/gpr/string_windows.cc
   - src/core/lib/gpr/sync.cc
+  - src/core/lib/gpr/sync_abseil.cc
   - src/core/lib/gpr/sync_posix.cc
   - src/core/lib/gpr/sync_windows.cc
   - src/core/lib/gpr/time.cc
@@ -287,6 +288,7 @@ filegroups:
   - include/grpc/support/port_platform.h
   - include/grpc/support/string_util.h
   - include/grpc/support/sync.h
+  - include/grpc/support/sync_abseil.h
   - include/grpc/support/sync_custom.h
   - include/grpc/support/sync_generic.h
   - include/grpc/support/sync_posix.h
@@ -337,6 +339,7 @@ filegroups:
   - include/grpc/impl/codegen/log.h
   - include/grpc/impl/codegen/port_platform.h
   - include/grpc/impl/codegen/sync.h
+  - include/grpc/impl/codegen/sync_abseil.h
   - include/grpc/impl/codegen/sync_custom.h
   - include/grpc/impl/codegen/sync_generic.h
   - include/grpc/impl/codegen/sync_posix.h
diff --git a/config.m4 b/config.m4
index 4e4f6e8d675..8278e2500fa 100644
--- a/config.m4
+++ b/config.m4
@@ -230,6 +230,7 @@ if test "$PHP_GRPC" != "no"; then
     src/core/lib/gpr/string_util_windows.cc \
     src/core/lib/gpr/string_windows.cc \
     src/core/lib/gpr/sync.cc \
+    src/core/lib/gpr/sync_abseil.cc \
     src/core/lib/gpr/sync_posix.cc \
     src/core/lib/gpr/sync_windows.cc \
     src/core/lib/gpr/time.cc \
diff --git a/config.w32 b/config.w32
index f2b8433232c..bbd6318b8ee 100644
--- a/config.w32
+++ b/config.w32
@@ -199,6 +199,7 @@ if (PHP_GRPC != "no") {
     "src\\core\\lib\\gpr\\string_util_windows.cc " +
     "src\\core\\lib\\gpr\\string_windows.cc " +
     "src\\core\\lib\\gpr\\sync.cc " +
+    "src\\core\\lib\\gpr\\sync_abseil.cc " +
     "src\\core\\lib\\gpr\\sync_posix.cc " +
     "src\\core\\lib\\gpr\\sync_windows.cc " +
     "src\\core\\lib\\gpr\\time.cc " +
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 2bab109f71d..6fdda1cb52e 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -139,6 +139,7 @@ Pod::Spec.new do |s|
                       'include/grpc/impl/codegen/slice.h',
                       'include/grpc/impl/codegen/status.h',
                       'include/grpc/impl/codegen/sync.h',
+                      'include/grpc/impl/codegen/sync_abseil.h',
                       'include/grpc/impl/codegen/sync_custom.h',
                       'include/grpc/impl/codegen/sync_generic.h',
                       'include/grpc/impl/codegen/sync_posix.h',
@@ -158,6 +159,7 @@ Pod::Spec.new do |s|
                       'include/grpc/support/port_platform.h',
                       'include/grpc/support/string_util.h',
                       'include/grpc/support/sync.h',
+                      'include/grpc/support/sync_abseil.h',
                       'include/grpc/support/sync_custom.h',
                       'include/grpc/support/sync_generic.h',
                       'include/grpc/support/sync_posix.h',
@@ -531,6 +533,7 @@ Pod::Spec.new do |s|
                       'src/core/lib/gpr/string_windows.cc',
                       'src/core/lib/gpr/string_windows.h',
                       'src/core/lib/gpr/sync.cc',
+                      'src/core/lib/gpr/sync_abseil.cc',
                       'src/core/lib/gpr/sync_posix.cc',
                       'src/core/lib/gpr/sync_windows.cc',
                       'src/core/lib/gpr/time.cc',
diff --git a/grpc.gemspec b/grpc.gemspec
index 49b9a684f8e..3cd9dcb4b58 100644
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -73,6 +73,7 @@ Gem::Specification.new do |s|
   s.files += %w( include/grpc/impl/codegen/slice.h )
   s.files += %w( include/grpc/impl/codegen/status.h )
   s.files += %w( include/grpc/impl/codegen/sync.h )
+  s.files += %w( include/grpc/impl/codegen/sync_abseil.h )
   s.files += %w( include/grpc/impl/codegen/sync_custom.h )
   s.files += %w( include/grpc/impl/codegen/sync_generic.h )
   s.files += %w( include/grpc/impl/codegen/sync_posix.h )
@@ -92,6 +93,7 @@ Gem::Specification.new do |s|
   s.files += %w( include/grpc/support/port_platform.h )
   s.files += %w( include/grpc/support/string_util.h )
   s.files += %w( include/grpc/support/sync.h )
+  s.files += %w( include/grpc/support/sync_abseil.h )
   s.files += %w( include/grpc/support/sync_custom.h )
   s.files += %w( include/grpc/support/sync_generic.h )
   s.files += %w( include/grpc/support/sync_posix.h )
@@ -453,6 +455,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/gpr/string_windows.cc )
   s.files += %w( src/core/lib/gpr/string_windows.h )
   s.files += %w( src/core/lib/gpr/sync.cc )
+  s.files += %w( src/core/lib/gpr/sync_abseil.cc )
   s.files += %w( src/core/lib/gpr/sync_posix.cc )
   s.files += %w( src/core/lib/gpr/sync_windows.cc )
   s.files += %w( src/core/lib/gpr/time.cc )
diff --git a/grpc.gyp b/grpc.gyp
index 7067a8f7c7b..3f3fd1fd814 100644
--- a/grpc.gyp
+++ b/grpc.gyp
@@ -466,6 +466,7 @@
         'src/core/lib/gpr/string_util_windows.cc',
         'src/core/lib/gpr/string_windows.cc',
         'src/core/lib/gpr/sync.cc',
+        'src/core/lib/gpr/sync_abseil.cc',
         'src/core/lib/gpr/sync_posix.cc',
         'src/core/lib/gpr/sync_windows.cc',
         'src/core/lib/gpr/time.cc',
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index 98b516b625d..cb3fb79f5ed 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -34,6 +34,13 @@
 #define GRPC_USE_ABSL 1
 #endif
 
+/*
+ * Defines GPR_ABSEIL_SYNC to use synchronization features from Abseil
+ */
+#ifndef GPR_ABSEIL_SYNC
+/* #define GPR_ABSEIL_SYNC 1 */
+#endif
+
 /* Get windows.h included everywhere (we need it) */
 #if defined(_WIN64) || defined(WIN64) || defined(_WIN32) || defined(WIN32)
 #ifndef WIN32_LEAN_AND_MEAN
diff --git a/include/grpc/impl/codegen/sync.h b/include/grpc/impl/codegen/sync.h
index 3df68c644f7..49e3194748f 100644
--- a/include/grpc/impl/codegen/sync.h
+++ b/include/grpc/impl/codegen/sync.h
@@ -46,12 +46,14 @@ extern "C" {
 
 #include <grpc/impl/codegen/sync_generic.h>
 
-#if defined(GPR_POSIX_SYNC)
+#if defined(GPR_CUSTOM_SYNC)
+#include <grpc/impl/codegen/sync_custom.h>
+#elif defined(GPR_ABSEIL_SYNC)
+#include <grpc/impl/codegen/sync_abseil.h>
+#elif defined(GPR_POSIX_SYNC)
 #include <grpc/impl/codegen/sync_posix.h>
 #elif defined(GPR_WINDOWS)
 #include <grpc/impl/codegen/sync_windows.h>
-#elif defined(GPR_CUSTOM_SYNC)
-#include <grpc/impl/codegen/sync_custom.h>
 #else
 #error Unable to determine platform for sync
 #endif
diff --git a/include/grpc/impl/codegen/sync_abseil.h b/include/grpc/impl/codegen/sync_abseil.h
new file mode 100644
index 00000000000..38dfab32737
--- /dev/null
+++ b/include/grpc/impl/codegen/sync_abseil.h
@@ -0,0 +1,36 @@
+/*
+ *
+ * Copyright 2020 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPC_IMPL_CODEGEN_SYNC_ABSEIL_H
+#define GRPC_IMPL_CODEGEN_SYNC_ABSEIL_H
+
+#include <grpc/impl/codegen/port_platform.h>
+
+#include <grpc/impl/codegen/sync_generic.h>
+
+#ifdef GPR_ABSEIL_SYNC
+
+typedef intptr_t gpr_mu;
+typedef intptr_t gpr_cv;
+typedef int32_t gpr_once;
+
+#define GPR_ONCE_INIT 0
+
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_SYNC_ABSEIL_H */
diff --git a/include/grpc/module.modulemap b/include/grpc/module.modulemap
index 9612a05bf5b..5e3b97e1b86 100644
--- a/include/grpc/module.modulemap
+++ b/include/grpc/module.modulemap
@@ -10,6 +10,7 @@ framework module grpc {
   header "support/port_platform.h"
   header "support/string_util.h"
   header "support/sync.h"
+  header "support/sync_abseil.h"
   header "support/sync_generic.h"
   header "support/thd_id.h"
   header "support/time.h"
@@ -20,6 +21,7 @@ framework module grpc {
   header "impl/codegen/log.h"
   header "impl/codegen/port_platform.h"
   header "impl/codegen/sync.h"
+  header "impl/codegen/sync_abseil.h"
   header "impl/codegen/sync_generic.h"
   header "impl/codegen/byte_buffer.h"
   header "impl/codegen/byte_buffer_reader.h"
@@ -36,6 +38,7 @@ framework module grpc {
   header "impl/codegen/log.h"
   header "impl/codegen/port_platform.h"
   header "impl/codegen/sync.h"
+  header "impl/codegen/sync_abseil.h"
   header "impl/codegen/sync_generic.h"
   header "grpc_security.h"
   header "byte_buffer.h"
diff --git a/include/grpc/support/sync_abseil.h b/include/grpc/support/sync_abseil.h
new file mode 100644
index 00000000000..3ee73489786
--- /dev/null
+++ b/include/grpc/support/sync_abseil.h
@@ -0,0 +1,26 @@
+/*
+ *
+ * Copyright 2020 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPC_SUPPORT_SYNC_ABSEIL_H
+#define GRPC_SUPPORT_SYNC_ABSEIL_H
+
+#include <grpc/support/port_platform.h>
+
+#include <grpc/impl/codegen/sync_abseil.h>
+
+#endif /* GRPC_SUPPORT_SYNC_ABSEIL_H */
diff --git a/package.xml b/package.xml
index 07e5a75383f..cd9e718c6a2 100644
--- a/package.xml
+++ b/package.xml
@@ -56,6 +56,7 @@
     <file baseinstalldir="/" name="include/grpc/impl/codegen/slice.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/status.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_abseil.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_custom.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_generic.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/impl/codegen/sync_posix.h" role="src" />
@@ -75,6 +76,7 @@
     <file baseinstalldir="/" name="include/grpc/support/port_platform.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/string_util.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/sync.h" role="src" />
+    <file baseinstalldir="/" name="include/grpc/support/sync_abseil.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/sync_custom.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/sync_generic.h" role="src" />
     <file baseinstalldir="/" name="include/grpc/support/sync_posix.h" role="src" />
@@ -436,6 +438,7 @@
     <file baseinstalldir="/" name="src/core/lib/gpr/string_windows.cc" role="src" />
     <file baseinstalldir="/" name="src/core/lib/gpr/string_windows.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/gpr/sync.cc" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/gpr/sync_abseil.cc" role="src" />
     <file baseinstalldir="/" name="src/core/lib/gpr/sync_posix.cc" role="src" />
     <file baseinstalldir="/" name="src/core/lib/gpr/sync_windows.cc" role="src" />
     <file baseinstalldir="/" name="src/core/lib/gpr/time.cc" role="src" />
diff --git a/src/core/lib/gpr/sync_abseil.cc b/src/core/lib/gpr/sync_abseil.cc
new file mode 100644
index 00000000000..2a1ca05d9a0
--- /dev/null
+++ b/src/core/lib/gpr/sync_abseil.cc
@@ -0,0 +1,114 @@
+/*
+ *
+ * Copyright 2020 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#if defined(GPR_ABSEIL_SYNC) && !defined(GPR_CUSTOM_SYNC)
+
+#include <grpc/support/alloc.h>
+
+#include <errno.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/time.h>
+#include <time.h>
+#include "src/core/lib/profiling/timers.h"
+
+#include "absl/base/call_once.h"
+#include "absl/synchronization/mutex.h"
+#include "absl/time/clock.h"
+#include "absl/time/time.h"
+
+#ifdef GPR_LOW_LEVEL_COUNTERS
+gpr_atm gpr_mu_locks = 0;
+gpr_atm gpr_counter_atm_cas = 0;
+gpr_atm gpr_counter_atm_add = 0;
+#endif
+
+void gpr_mu_init(gpr_mu* mu) {
+  static_assert(sizeof(gpr_mu) == sizeof(absl::Mutex),
+                "gpr_mu and Mutex must be the same size");
+  new (mu) absl::Mutex;
+}
+
+void gpr_mu_destroy(gpr_mu* mu) {
+  reinterpret_cast<absl::Mutex*>(mu)->~Mutex();
+}
+
+void gpr_mu_lock(gpr_mu* mu) ABSL_NO_THREAD_SAFETY_ANALYSIS {
+  GPR_TIMER_SCOPE("gpr_mu_lock", 0);
+  reinterpret_cast<absl::Mutex*>(mu)->Lock();
+}
+
+void gpr_mu_unlock(gpr_mu* mu) ABSL_NO_THREAD_SAFETY_ANALYSIS {
+  GPR_TIMER_SCOPE("gpr_mu_unlock", 0);
+  reinterpret_cast<absl::Mutex*>(mu)->Unlock();
+}
+
+int gpr_mu_trylock(gpr_mu* mu) {
+  GPR_TIMER_SCOPE("gpr_mu_trylock", 0);
+  int ret = reinterpret_cast<absl::Mutex*>(mu)->TryLock() == true;
+  return ret;
+}
+
+/*----------------------------------------*/
+
+void gpr_cv_init(gpr_cv* cv) {
+  static_assert(sizeof(gpr_cv) == sizeof(absl::CondVar),
+                "gpr_cv and CondVar must be the same size");
+  new (cv) absl::CondVar;
+}
+
+void gpr_cv_destroy(gpr_cv* cv) {
+  reinterpret_cast<absl::CondVar*>(cv)->~CondVar();
+}
+
+int gpr_cv_wait(gpr_cv* cv, gpr_mu* mu, gpr_timespec abs_deadline) {
+  GPR_TIMER_SCOPE("gpr_cv_wait", 0);
+  if (gpr_time_cmp(abs_deadline, gpr_inf_future(abs_deadline.clock_type)) ==
+      0) {
+    reinterpret_cast<absl::CondVar*>(cv)->Wait(
+        reinterpret_cast<absl::Mutex*>(mu));
+    return 0;
+  }
+  abs_deadline = gpr_convert_clock_type(abs_deadline, GPR_CLOCK_REALTIME);
+  timespec ts = {static_cast<decltype(ts.tv_sec)>(abs_deadline.tv_sec),
+                 static_cast<decltype(ts.tv_nsec)>(abs_deadline.tv_nsec)};
+  int ret = reinterpret_cast<absl::CondVar*>(cv)->WaitWithDeadline(
+                reinterpret_cast<absl::Mutex*>(mu),
+                absl::TimeFromTimespec(ts)) == true;
+  return ret;
+}
+
+void gpr_cv_signal(gpr_cv* cv) {
+  GPR_TIMER_MARK("gpr_cv_signal", 0);
+  reinterpret_cast<absl::CondVar*>(cv)->Signal();
+}
+
+void gpr_cv_broadcast(gpr_cv* cv) {
+  GPR_TIMER_MARK("gpr_cv_broadcast", 0);
+  reinterpret_cast<absl::CondVar*>(cv)->SignalAll();
+}
+
+/*----------------------------------------*/
+
+void gpr_once_init(gpr_once* once, void (*init_function)(void)) {
+  absl::call_once(*reinterpret_cast<absl::once_flag*>(once), init_function);
+}
+
+#endif /* defined(GPR_ABSEIL_SYNC) && !defined(GPR_CUSTOM_SYNC) */
diff --git a/src/core/lib/gpr/sync_posix.cc b/src/core/lib/gpr/sync_posix.cc
index fe2d5a9ca38..120bfda25c2 100644
--- a/src/core/lib/gpr/sync_posix.cc
+++ b/src/core/lib/gpr/sync_posix.cc
@@ -18,15 +18,17 @@
 
 #include <grpc/support/port_platform.h>
 
-#include <grpc/support/alloc.h>
-
-#ifdef GPR_POSIX_SYNC
+#if defined(GPR_POSIX_SYNC) && !defined(GPR_ABSEIL_SYNC) && \
+    !defined(GPR_CUSTOM_SYNC)
 
-#include <errno.h>
+#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
+
+#include <errno.h>
 #include <time.h>
+
 #include "src/core/lib/profiling/timers.h"
 
 #ifdef GPR_LOW_LEVEL_COUNTERS
@@ -170,4 +172,5 @@ void gpr_once_init(gpr_once* once, void (*init_function)(void)) {
   GPR_ASSERT(pthread_once(once, init_function) == 0);
 }
 
-#endif /* GRP_POSIX_SYNC */
+#endif /* defined(GPR_POSIX_SYNC) && !defined(GPR_ABSEIL_SYNC) && \
+          !defined(GPR_CUSTOM_SYNC) */
diff --git a/src/core/lib/gpr/sync_windows.cc b/src/core/lib/gpr/sync_windows.cc
index 7cd41633d53..64eec7c2e11 100644
--- a/src/core/lib/gpr/sync_windows.cc
+++ b/src/core/lib/gpr/sync_windows.cc
@@ -20,7 +20,8 @@
 
 #include <grpc/support/port_platform.h>
 
-#ifdef GPR_WINDOWS
+#if defined(GPR_WINDOWS) && !defined(GPR_ABSEIL_SYNC) && \
+    !defined(GPR_CUSTOM_SYNC)
 
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
@@ -115,4 +116,5 @@ void gpr_once_init(gpr_once* once, void (*init_function)(void)) {
   InitOnceExecuteOnce(once, run_once_func, &arg, &dummy);
 }
 
-#endif /* GPR_WINDOWS */
+#endif /* defined(GPR_WINDOWS) && !defined(GPR_ABSEIL_SYNC) && \
+          !defined(GPR_CUSTOM_SYNC) */
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 580cc6761e3..f0c99ecc590 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -208,6 +208,7 @@ CORE_SOURCE_FILES = [
     'src/core/lib/gpr/string_util_windows.cc',
     'src/core/lib/gpr/string_windows.cc',
     'src/core/lib/gpr/sync.cc',
+    'src/core/lib/gpr/sync_abseil.cc',
     'src/core/lib/gpr/sync_posix.cc',
     'src/core/lib/gpr/sync_windows.cc',
     'src/core/lib/gpr/time.cc',
diff --git a/test/core/surface/public_headers_must_be_c89.c b/test/core/surface/public_headers_must_be_c89.c
index 3c20e55620e..b6ba715e247 100644
--- a/test/core/surface/public_headers_must_be_c89.c
+++ b/test/core/surface/public_headers_must_be_c89.c
@@ -39,6 +39,7 @@
 #include <grpc/impl/codegen/slice.h>
 #include <grpc/impl/codegen/status.h>
 #include <grpc/impl/codegen/sync.h>
+#include <grpc/impl/codegen/sync_abseil.h>
 #include <grpc/impl/codegen/sync_custom.h>
 #include <grpc/impl/codegen/sync_generic.h>
 #include <grpc/load_reporting.h>
@@ -52,6 +53,7 @@
 #include <grpc/support/port_platform.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
+#include <grpc/support/sync_abseil.h>
 #include <grpc/support/sync_custom.h>
 #include <grpc/support/sync_generic.h>
 #include <grpc/support/thd_id.h>
diff --git a/tools/doxygen/Doxyfile.c++ b/tools/doxygen/Doxyfile.c++
index 2c857a10650..d3d4b096043 100644
--- a/tools/doxygen/Doxyfile.c++
+++ b/tools/doxygen/Doxyfile.c++
@@ -900,6 +900,7 @@ include/grpc/impl/codegen/propagation_bits.h \
 include/grpc/impl/codegen/slice.h \
 include/grpc/impl/codegen/status.h \
 include/grpc/impl/codegen/sync.h \
+include/grpc/impl/codegen/sync_abseil.h \
 include/grpc/impl/codegen/sync_custom.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
@@ -919,6 +920,7 @@ include/grpc/support/log_windows.h \
 include/grpc/support/port_platform.h \
 include/grpc/support/string_util.h \
 include/grpc/support/sync.h \
+include/grpc/support/sync_abseil.h \
 include/grpc/support/sync_custom.h \
 include/grpc/support/sync_generic.h \
 include/grpc/support/sync_posix.h \
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 4408ada7f66..b72624b8cc2 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -901,6 +901,7 @@ include/grpc/impl/codegen/propagation_bits.h \
 include/grpc/impl/codegen/slice.h \
 include/grpc/impl/codegen/status.h \
 include/grpc/impl/codegen/sync.h \
+include/grpc/impl/codegen/sync_abseil.h \
 include/grpc/impl/codegen/sync_custom.h \
 include/grpc/impl/codegen/sync_generic.h \
 include/grpc/impl/codegen/sync_posix.h \
@@ -920,6 +921,7 @@ include/grpc/support/log_windows.h \
 include/grpc/support/port_platform.h \
 include/grpc/support/string_util.h \
 include/grpc/support/sync.h \
+include/grpc/support/sync_abseil.h \
 include/grpc/support/sync_custom.h \
 include/grpc/support/sync_generic.h \
 include/grpc/support/sync_posix.h \
diff --git a/tools/doxygen/Doxyfile.core b/tools/doxygen/Doxyfile.core
index df67542e6f2..54bac85317f 100644
--- a/tools/doxygen/Doxyfile.core
+++ b/tools/doxygen/Doxyfile.core
@@ -842,6 +842,8 @@ include/grpc/impl/codegen/slice.h \
 include/grpc/impl/codegen/status.h \
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync.h \
+include/grpc/impl/codegen/sync_abseil.h \
+include/grpc/impl/codegen/sync_abseil.h \
 include/grpc/impl/codegen/sync_custom.h \
 include/grpc/impl/codegen/sync_custom.h \
 include/grpc/impl/codegen/sync_generic.h \
@@ -865,6 +867,7 @@ include/grpc/support/log_windows.h \
 include/grpc/support/port_platform.h \
 include/grpc/support/string_util.h \
 include/grpc/support/sync.h \
+include/grpc/support/sync_abseil.h \
 include/grpc/support/sync_custom.h \
 include/grpc/support/sync_generic.h \
 include/grpc/support/sync_posix.h \
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 87ba22e7336..1fe83249e55 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -842,6 +842,8 @@ include/grpc/impl/codegen/slice.h \
 include/grpc/impl/codegen/status.h \
 include/grpc/impl/codegen/sync.h \
 include/grpc/impl/codegen/sync.h \
+include/grpc/impl/codegen/sync_abseil.h \
+include/grpc/impl/codegen/sync_abseil.h \
 include/grpc/impl/codegen/sync_custom.h \
 include/grpc/impl/codegen/sync_custom.h \
 include/grpc/impl/codegen/sync_generic.h \
@@ -865,6 +867,7 @@ include/grpc/support/log_windows.h \
 include/grpc/support/port_platform.h \
 include/grpc/support/string_util.h \
 include/grpc/support/sync.h \
+include/grpc/support/sync_abseil.h \
 include/grpc/support/sync_custom.h \
 include/grpc/support/sync_generic.h \
 include/grpc/support/sync_posix.h \
@@ -1242,6 +1245,7 @@ src/core/lib/gpr/string_util_windows.cc \
 src/core/lib/gpr/string_windows.cc \
 src/core/lib/gpr/string_windows.h \
 src/core/lib/gpr/sync.cc \
+src/core/lib/gpr/sync_abseil.cc \
 src/core/lib/gpr/sync_posix.cc \
 src/core/lib/gpr/sync_windows.cc \
 src/core/lib/gpr/time.cc \