Initial Commit

24 files changed, 1245 insertions, 0 deletions

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..bbc1bb1
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,85 @@
+---
+Language:        Cpp
+# BasedOnStyle:  LLVM
+AccessModifierOffset: -2
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlinesLeft: false
+AlignOperands:   true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: false
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:
+  AfterClass:      true
+  AfterControlStatement: true
+  AfterEnum:       true
+  AfterFunction:   true
+  AfterNamespace:  true
+  AfterObjCDeclaration: true
+  AfterStruct:     true
+  AfterUnion:      true
+  BeforeCatch:     true
+  BeforeElse:      true
+  IndentBraces:    false
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: AfterColon
+ColumnLimit:     80
+CommentPragmas:  '^ IWYU pragma:'
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: true
+PointerAlignment: Left
+DisableFormat:   false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
+IndentCaseLabels: true
+IndentWidth:     4
+IndentWrappedFunctionNames: true
+KeepEmptyLinesAtTheStartOfBlocks: true
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBlockIndentWidth: 2
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Right
+ReflowComments:  true
+SortIncludes:    false
+SpaceAfterCStyleCast: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles:  false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard:        Cpp11
+TabWidth:        4
+UseTab:          Never
+...
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..511c641
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,46 @@
+# Test suite logs
+*.log
+
+# Code Coverage
+*.gcda
+*.gcno
+*.trs
+*-coverage*
+
+# CC / CXX Compiler
+*.ii
+*.i
+*.o
+*.s
+
+# Libtool
+*.la
+*.lo
+
+# Autotools
+.deps
+.dirstamp
+.libs
+/aclocal.m4
+/autom4te.cache
+/build-aux
+/config.h
+/config.h.in
+/config.h.in~
+/config.log
+/config.status
+/configure
+/m4
+/libtool
+Makefile
+Makefile.in
+/stamp-h1
+
+# Custom generated files
+/src/sdeventplus.pc
+
+# Output binaries
+/example/follow
+/test/event
+/test/exception
+/test/sdref
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..8dada3e
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      "License" shall mean the terms and conditions for use, reproduction,
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+      any Contribution intentionally submitted for inclusion in the Work
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diff --git a/MAINTAINERS b/MAINTAINERS
new file mode 100644
index 0000000..3934d40
--- /dev/null
+++ b/MAINTAINERS
@@ -0,0 +1,45 @@
+How to use this list:
+    Find the most specific section entry (described below) that matches where
+    your change lives and add the reviewers (R) and maintainers (M) as
+    reviewers. You can use the same method to track down who knows a particular
+    code base best.
+
+    Your change/query may span multiple entries; that is okay.
+
+    If you do not find an entry that describes your request at all, someone
+    forgot to update this list; please at least file an issue or send an email
+    to a maintainer, but preferably you should just update this document.
+
+Description of section entries:
+
+    Section entries are structured according to the following scheme:
+
+    X:  NAME <EMAIL_USERNAME@DOMAIN> <IRC_USERNAME!>
+    X:  ...
+    .
+    .
+    .
+
+    Where REPO_NAME is the name of the repository within the OpenBMC GitHub
+    organization; FILE_PATH is a file path within the repository, possibly with
+    wildcards; X is a tag of one of the following types:
+
+    M:  Denotes maintainer; has fields NAME <EMAIL_USERNAME@DOMAIN> <IRC_USERNAME!>;
+        if omitted from an entry, assume one of the maintainers from the
+        MAINTAINERS entry.
+    R:  Denotes reviewer; has fields NAME <EMAIL_USERNAME@DOMAIN> <IRC_USERNAME!>;
+        these people are to be added as reviewers for a change matching the repo
+        path.
+    F:  Denotes forked from an external repository; has fields URL.
+
+    Line comments are to be denoted "# SOME COMMENT" (typical shell style
+    comment); it is important to follow the correct syntax and semantics as we
+    may want to use automated tools with this file in the future.
+
+    A change cannot be added to an OpenBMC repository without a MAINTAINER's
+    approval; thus, a MAINTAINER should always be listed as a reviewer.
+
+START OF MAINTAINERS LIST
+-------------------------
+
+M:  William A. Kenngton III <wak@google.com> <wak-work!>
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..9bddc5e
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,4 @@
+ACLOCAL_AMFLAGS = -I m4
+
+EXTRA_DIST = LICENSE MAINTAINERS README.md
+SUBDIRS = src example test
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3bbb9e8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,29 @@
+# sdeventplus
+
+sdeventplus is a c++ wrapper around the systemd sd_event apis meant
+to provide c++ ergonomics to their usage.
+
+## Dependencies
+
+The sdeventplus library requires libsystemd for sd-event.
+
+Test cases require google{test,mock}, valgrind, and lcov.
+
+## Building
+For a standard release build, you want something like:
+```
+./bootstrap.sh
+./configure --disable-tests
+make
+make install
+```
+
+For a test / debug build, a typical configuration is
+```
+./bootstrap.sh
+./configure --enable-tests --enable-coverage --enable-valgrind
+make
+make check
+make check-valgrind
+make check-code-coverage
+```
diff --git a/bootstrap.sh b/bootstrap.sh
new file mode 100755
index 0000000..30ef75a
--- /dev/null
+++ b/bootstrap.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+set -e
+set -x
+autoreconf -v -f -i
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..67566fc
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,154 @@
+# Initialization
+AC_PREREQ([2.69])
+AC_INIT([sdeventplus], [0.1], [https://github.com/openbmc/sdeventplus/issues])
+AC_LANG([C++])
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIRS([m4])
+AC_CONFIG_AUX_DIR([build-aux])
+AM_INIT_AUTOMAKE([foreign subdir-objects -Wall -Werror dist-xz tar-ustar])
+AM_SILENT_RULES([yes])
+
+# Make sure the default CFLAGS of `-O2 -g` don't override CODE_COVERAGE_CFLAGS
+# It is important that this comes before AC_PROG_C{C,XX}, as we are attempting
+# to stop them from populating default CFLAGS and CXXFLAGS.
+AS_IF([test "x$enable_code_coverage" != "xno"], [
+    AS_IF([test "x${CXXFLAGS+set}" != "xset"], [
+        AC_SUBST(CXXFLAGS, [""])
+    ])
+    AS_IF([test "x${CFLAGS+set}" != "xset"], [
+        AC_SUBST(CFLAGS, [""])
+    ])
+])
+
+# Checks for programs.
+AC_PROG_CXX
+AC_PROG_CC
+AM_PROG_AR
+AC_PROG_INSTALL
+AC_PROG_MAKE_SET
+
+# Checks for libtool
+LT_INIT # Removes 'unrecognized options: --with-libtool-sysroot'
+
+# Make sure the pkgconfigdata is configured for automake
+PKG_INSTALLDIR
+
+# Checks for typedefs, structures, and compiler characteristics.
+AX_CXX_COMPILE_STDCXX([14], [noext], [mandatory])
+AX_APPEND_COMPILE_FLAGS([-Wall -Wextra -Wpedantic], [CFLAGS])
+AX_APPEND_COMPILE_FLAGS([-Wall -Wextra -Wpedantic], [CXXFLAGS])
+
+# We require systemd unconditionally
+AX_PKG_CHECK_MODULES([SYSTEMD], [libsystemd >= 218])
+
+AX_SAVE_FLAGS_WITH_PREFIX(OLD, [CPPFLAGS])
+AX_APPEND_COMPILE_FLAGS([$SYSTEMD_CFLAGS], [CPPFLAGS])
+AC_CHECK_HEADERS([systemd/sd-event.h], [],
+    [AC_MSG_ERROR([Could not find systemd/sd-event.h])])
+AX_RESTORE_FLAGS_WITH_PREFIX(OLD, [CPPFLAGS])
+
+AX_SAVE_FLAGS_WITH_PREFIX(OLD, [LDFLAGS])
+AX_APPEND_COMPILE_FLAGS([$SYSTEMD_LIBS], [LDFLAGS])
+AC_CHECK_LIB([systemd], [sd_event_default], [], [
+    AC_MSG_ERROR([Could not find sd_event_default in libsystemd])
+])
+AX_RESTORE_FLAGS_WITH_PREFIX(OLD, [LDFLAGS])
+
+# Make it possible for users to choose if they want test support
+# explicitly or not at all
+AC_ARG_ENABLE([tests], [Whether we should build test cases])
+
+# Check/set gtest specific functions.
+AS_IF([test "x$enable_tests" != "xno"], [
+    PKG_CHECK_MODULES([GTEST], [gtest], [], [true])
+    PKG_CHECK_MODULES([GMOCK], [gmock], [], [true])
+    AX_PTHREAD
+
+    AX_SAVE_FLAGS_WITH_PREFIX(OLD, [CPPFLAGS])
+    AX_APPEND_COMPILE_FLAGS([$GTEST_CFLAGS], [CPPFLAGS])
+    AC_LANG_PUSH([C++])
+    AC_CHECK_HEADERS([gtest/gtest.h], [
+        AS_IF([test "x$GTEST_CFLAGS" = "x"], [
+            AS_IF([test "x$PTHREAD_CFLAGS" = "x"], [
+                AX_APPEND_COMPILE_FLAGS(["-DGTEST_HAS_PTHREAD=0"], [GTEST_CFLAGS])
+            ], [
+                AX_APPEND_COMPILE_FLAGS(["-DGTEST_HAS_PTHREAD=1"], [GTEST_CFLAGS])
+                AX_APPEND_COMPILE_FLAGS([$PTHREAD_CFLAGS], [GTEST_CFLAGS])
+            ])
+        ])
+    ], [
+        AS_IF([test "x$enable_tests" = "xyes"], [
+            AC_MSG_ERROR([Testing enabled but could not find gtest/gtest.h])
+        ])
+    ])
+    AC_LANG_POP([C++])
+    AX_RESTORE_FLAGS_WITH_PREFIX(OLD, [CPPFLAGS])
+
+    AX_SAVE_FLAGS_WITH_PREFIX(OLD, [CPPFLAGS])
+    AX_APPEND_COMPILE_FLAGS([$GMOCK_CFLAGS], [CPPFLAGS])
+    AC_LANG_PUSH([C++])
+    AC_CHECK_HEADERS([gmock/gmock.h], [], [
+        AS_IF([test "x$enable_tests" = "xyes"], [
+            AC_MSG_ERROR([Testing enabled but could not find gmock/gmock.h])
+        ])
+    ])
+    AC_LANG_POP([C++])
+    AX_RESTORE_FLAGS_WITH_PREFIX(OLD, [CPPFLAGS])
+
+    AX_SAVE_FLAGS_WITH_PREFIX(OLD, [LDFLAGS])
+    AX_APPEND_COMPILE_FLAGS([$GTEST_LIBS], [LDFLAGS])
+    AC_CHECK_LIB([gtest], [main], [
+        AS_IF([test "x$GTEST_LIBS" = "x"], [
+            AX_APPEND_COMPILE_FLAGS([-lgtest], [GTEST_LIBS])
+        ])
+    ], [
+        AS_IF([test "x$enable_tests" = "xyes"], [
+            AC_MSG_ERROR([Testing enabled but couldn't find gtest libs])
+        ])
+    ])
+    AX_RESTORE_FLAGS_WITH_PREFIX(OLD, [LDFLAGS])
+
+    AX_SAVE_FLAGS_WITH_PREFIX(OLD, [LDFLAGS])
+    AX_APPEND_COMPILE_FLAGS([$GMOCK_LIBS], [LDFLAGS])
+    AC_CHECK_LIB([gmock], [main], [
+        AS_IF([test "x$GMOCK_LIBS" = "x"], [
+            AX_APPEND_COMPILE_FLAGS([-lgmock], [GMOCK_LIBS])
+        ])
+    ], [
+        AS_IF([test "x$enable_tests" = "xyes"], [
+            AC_MSG_ERROR([Testing enabled but couldn't find gmock libs])
+        ])
+    ])
+    AX_RESTORE_FLAGS_WITH_PREFIX(OLD, [LDFLAGS])
+])
+
+# Check for valgrind
+AS_IF([test "x$enable_tests" != "xno"], [
+    m4_foreach([vgtool], [valgrind_tool_list],
+        [AX_VALGRIND_DFLT(vgtool, [off])])
+    AX_VALGRIND_DFLT([memcheck], [on])
+    AX_VALGRIND_CHECK
+    AM_EXTRA_RECURSIVE_TARGETS([check-valgrind])
+    m4_foreach([vgtool], [valgrind_tool_list],
+        [AM_EXTRA_RECURSIVE_TARGETS([check-valgrind-]vgtool)])
+])
+
+# Code coverage
+AS_IF([test "x$enable_tests" != "xno"], [
+    AX_CODE_COVERAGE
+    AM_EXTRA_RECURSIVE_TARGETS([check-code-coverage])
+])
+
+# Append -Werror after doing autoconf compiler checks
+# Otherwise some perfectly valid checks can fail and cause our
+# final configuratin to be broken.
+AC_ARG_ENABLE([werror], [Whether to automatically add -Werror CFLAGS])
+AS_IF([test "x$enable_tests" != "xno"], [
+    AX_APPEND_COMPILE_FLAGS([-Werror], [CFLAGS])
+    AX_APPEND_COMPILE_FLAGS([-Werror], [CXXFLAGS])
+])
+
+# Create configured output
+AC_CONFIG_FILES([Makefile example/Makefile src/Makefile test/Makefile])
+AC_CONFIG_FILES([src/sdeventplus.pc])
+AC_OUTPUT
diff --git a/example/Makefile.am b/example/Makefile.am
new file mode 100644
index 0000000..3fad73a
--- /dev/null
+++ b/example/Makefile.am
@@ -0,0 +1,11 @@
+AM_CPPFLAGS = -I$(top_builddir)/src -I$(top_srcdir)/src \
+              $(SYSTEMD_CFLAGS) $(CODE_COVERAGE_CPPFLAGS)
+AM_CFLAGS = $(CODE_COVERAGE_CFLAGS)
+AM_CXXFLAGS = $(CODE_COVERAGE_CXXFLAGS)
+common_ldadd = $(top_builddir)/src/libsdeventplus.la
+
+noinst_PROGRAMS =
+
+noinst_PROGRAMS += follow
+follow_SOURCES = follow.cpp
+follow_LDADD = $(common_ldadd)
diff --git a/example/follow.cpp b/example/follow.cpp
new file mode 100644
index 0000000..36cd44b
--- /dev/null
+++ b/example/follow.cpp
@@ -0,0 +1,14 @@
+#include <cstdio>
+#include <sdeventplus/event.hpp>
+
+int main(int argc, char* argv[])
+{
+    if (argc != 2)
+    {
+        fprintf(stderr, "Usage: %s [file]\n", argv[0]);
+        return 1;
+    }
+
+    sdeventplus::Event event = sdeventplus::Event::get_default();
+    return event.loop();
+}
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..5379c0a
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,22 @@
+AM_CPPFLAGS = $(SYSTEMD_CFLAGS) $(CODE_COVERAGE_CPPFLAGS)
+AM_CFLAGS = $(CODE_COVERAGE_CFLAGS)
+AM_CXXFLAGS = $(CODE_COVERAGE_CXXFLAGS)
+
+nobase_include_HEADERS =
+pkgconfig_DATA = sdeventplus.pc
+lib_LTLIBRARIES = libsdeventplus.la
+libsdeventplus_la_SOURCES =
+libsdeventplus_la_LIBADD = $(SYSTEMD_LIBS) $(CODE_COVERAGE_LIBS)
+
+nobase_include_HEADERS += sdeventplus/event.hpp
+libsdeventplus_la_SOURCES += sdeventplus/event.cpp
+
+nobase_include_HEADERS += sdeventplus/exception.hpp
+libsdeventplus_la_SOURCES += sdeventplus/exception.cpp
+
+nobase_include_HEADERS += sdeventplus/sdevent.hpp
+libsdeventplus_la_SOURCES += sdeventplus/sdevent.cpp
+
+nobase_include_HEADERS += sdeventplus/sdref.hpp
+
+nobase_include_HEADERS += sdeventplus/test/sdevent.hpp
diff --git a/src/sdeventplus.pc.in b/src/sdeventplus.pc.in
new file mode 100644
index 0000000..3d67d40
--- /dev/null
+++ b/src/sdeventplus.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: sdeventplus
+Version: @VERSION@
+Requires: @AX_PACKAGE_REQUIRES@
+Requires.private: @AX_PACKAGE_REQUIRES_PRIVATE@
+Cflags: -I${includedir}
+Libs: -L${libdir} -lsdeventplus
diff --git a/src/sdeventplus/event.cpp b/src/sdeventplus/event.cpp
new file mode 100644
index 0000000..1baca16
--- /dev/null
+++ b/src/sdeventplus/event.cpp
@@ -0,0 +1,53 @@
+#include <functional>
+#include <sdeventplus/event.hpp>
+#include <sdeventplus/exception.hpp>
+
+namespace sdeventplus
+{
+
+Event::Event(sd_event* event, SdEventInterface* intf) :
+    intf(intf), event(event, &SdEventInterface::sd_event_ref,
+                      &SdEventInterface::sd_event_unref, intf)
+{
+}
+
+Event::Event(sd_event* event, std::false_type, SdEventInterface* intf) :
+    intf(intf),
+    event(event, &SdEventInterface::sd_event_ref,
+          &SdEventInterface::sd_event_unref, std::false_type(), intf)
+{
+}
+
+Event Event::get_new(SdEventInterface* intf)
+{
+    sd_event* event = nullptr;
+    int r = intf->sd_event_new(&event);
+    if (r < 0)
+    {
+        throw SdEventError(-r, "sd_event_new");
+    }
+    return Event(event, std::false_type(), intf);
+}
+
+Event Event::get_default(SdEventInterface* intf)
+{
+    sd_event* event = nullptr;
+    int r = intf->sd_event_default(&event);
+    if (r < 0)
+    {
+        throw SdEventError(-r, "sd_event_default");
+    }
+    return Event(event, std::false_type(), intf);
+}
+
+int Event::loop()
+{
+    int r = intf->sd_event_loop(event.get());
+    if (r < 0)
+    {
+        throw SdEventError(-r, "sd_event_loop");
+    }
+    return r;
+}
+
+} // namespace sdeventplus
diff --git a/src/sdeventplus/event.hpp b/src/sdeventplus/event.hpp
new file mode 100644
index 0000000..e2372bb
--- /dev/null
+++ b/src/sdeventplus/event.hpp
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <memory>
+#include <sdeventplus/sdevent.hpp>
+#include <sdeventplus/sdref.hpp>
+#include <systemd/sd-event.h>
+
+namespace sdeventplus
+{
+
+class Event
+{
+  public:
+    Event(sd_event* event, SdEventInterface* intf = &sdevent_impl);
+    Event(sd_event* event, std::false_type,
+          SdEventInterface* intf = &sdevent_impl);
+    static Event get_new(SdEventInterface* intf = &sdevent_impl);
+    static Event get_default(SdEventInterface* intf = &sdevent_impl);
+
+    int loop();
+
+  private:
+    SdEventInterface* intf;
+    SdRef<sd_event> event;
+};
+
+} // namespace sdeventplus
diff --git a/src/sdeventplus/exception.cpp b/src/sdeventplus/exception.cpp
new file mode 100644
index 0000000..1cfba4f
--- /dev/null
+++ b/src/sdeventplus/exception.cpp
@@ -0,0 +1,12 @@
+#include <sdeventplus/exception.hpp>
+#include <system_error>
+
+namespace sdeventplus
+{
+
+SdEventError::SdEventError(int r, const char *prefix) :
+    std::system_error(r, std::generic_category(), prefix)
+{
+}
+
+} // namespace sdeventplus
diff --git a/src/sdeventplus/exception.hpp b/src/sdeventplus/exception.hpp
new file mode 100644
index 0000000..eb88649
--- /dev/null
+++ b/src/sdeventplus/exception.hpp
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <system_error>
+
+namespace sdeventplus
+{
+
+class SdEventError final : public std::system_error
+{
+  public:
+    SdEventError(int r, const char *prefix);
+};
+
+} // namespace sdeventplus
diff --git a/src/sdeventplus/sdevent.cpp b/src/sdeventplus/sdevent.cpp
new file mode 100644
index 0000000..d145f38
--- /dev/null
+++ b/src/sdeventplus/sdevent.cpp
@@ -0,0 +1,6 @@
+#include <sdeventplus/sdevent.hpp>
+
+namespace sdeventplus
+{
+SdEventImpl sdevent_impl;
+}
diff --git a/src/sdeventplus/sdevent.hpp b/src/sdeventplus/sdevent.hpp
new file mode 100644
index 0000000..129e67f
--- /dev/null
+++ b/src/sdeventplus/sdevent.hpp
@@ -0,0 +1,52 @@
+#pragma once
+
+#include <systemd/sd-event.h>
+
+namespace sdeventplus
+{
+
+class SdEventInterface
+{
+  public:
+    virtual ~SdEventInterface() = default;
+
+    virtual int sd_event_default(sd_event **event) const = 0;
+    virtual int sd_event_new(sd_event **event) const = 0;
+    virtual sd_event *sd_event_ref(sd_event *event) const = 0;
+    virtual sd_event *sd_event_unref(sd_event *event) const = 0;
+
+    virtual int sd_event_loop(sd_event *event) const = 0;
+};
+
+class SdEventImpl : public SdEventInterface
+{
+  public:
+    int sd_event_default(sd_event **event) const override
+    {
+        return ::sd_event_default(event);
+    }
+
+    int sd_event_new(sd_event **event) const override
+    {
+        return ::sd_event_default(event);
+    }
+
+    sd_event *sd_event_ref(sd_event *event) const override
+    {
+        return ::sd_event_ref(event);
+    }
+
+    sd_event *sd_event_unref(sd_event *event) const override
+    {
+        return ::sd_event_unref(event);
+    }
+
+    int sd_event_loop(sd_event *event) const override
+    {
+        return ::sd_event_loop(event);
+    }
+};
+
+extern SdEventImpl sdevent_impl;
+
+} // namespace sdeventplus
diff --git a/src/sdeventplus/sdref.hpp b/src/sdeventplus/sdref.hpp
new file mode 100644
index 0000000..492ae70
--- /dev/null
+++ b/src/sdeventplus/sdref.hpp
@@ -0,0 +1,89 @@
+#pragma once
+
+#include <functional>
+#include <memory>
+#include <sdeventplus/sdevent.hpp>
+#include <type_traits>
+
+namespace sdeventplus
+{
+
+template <typename T> class SdRef
+{
+  public:
+    using Func = std::function<T*(SdEventInterface*, T*)>;
+
+    SdRef(T* ref, Func take_ref, Func release_ref,
+          SdEventInterface* intf = sdevent_impl) :
+        SdRef(take_ref(intf, ref), take_ref, release_ref, std::false_type(),
+              intf)
+    {
+    }
+
+    SdRef(T* ref, Func take_ref, Func release_ref, std::false_type,
+          SdEventInterface* intf = sdevent_impl) :
+        intf(intf),
+        take_ref(take_ref), release_ref(release_ref), ref(ref)
+    {
+    }
+
+    SdRef(const SdRef& other) :
+        intf(other.intf), take_ref(other.take_ref),
+        release_ref(other.release_ref), ref(take_ref(intf, other.ref))
+    {
+    }
+
+    SdRef& operator=(const SdRef& other)
+    {
+        if (this != &other)
+        {
+            // release_ref will be invalid if moved
+            if (release_ref)
+                release_ref(intf, ref);
+
+            intf = other.intf;
+            take_ref = other.take_ref;
+            release_ref = other.release_ref;
+            ref = take_ref(intf, other.ref);
+        }
+        return *this;
+    }
+
+    SdRef(SdRef&& other) = default;
+
+    SdRef& operator=(SdRef&& other)
+    {
+        if (this != &other)
+        {
+            // release_ref will be invalid if move
+            if (release_ref)
+                release_ref(intf, ref);
+
+            intf = std::move(other.intf);
+            take_ref = std::move(other.take_ref);
+            release_ref = std::move(other.release_ref);
+            ref = std::move(other.ref);
+        }
+        return *this;
+    }
+
+    virtual ~SdRef()
+    {
+        // release_ref will be invalid after a move
+        if (release_ref)
+            release_ref(intf, ref);
+    }
+
+    T* get() const
+    {
+        return ref;
+    }
+
+  private:
+    SdEventInterface* intf;
+    Func take_ref;
+    Func release_ref;
+    T* ref;
+};
+
+} // namespace sdeventplus
diff --git a/src/sdeventplus/test/sdevent.hpp b/src/sdeventplus/test/sdevent.hpp
new file mode 100644
index 0000000..b467647
--- /dev/null
+++ b/src/sdeventplus/test/sdevent.hpp
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <gmock/gmock.h>
+#include <sdeventplus/sdevent.hpp>
+#include <systemd/sd-event.h>
+
+namespace sdeventplus
+{
+
+class SdEventMock : public SdEventInterface
+{
+  public:
+    MOCK_CONST_METHOD1(sd_event_default, int(sd_event **));
+    MOCK_CONST_METHOD1(sd_event_new, int(sd_event **));
+    MOCK_CONST_METHOD1(sd_event_ref, sd_event *(sd_event *));
+    MOCK_CONST_METHOD1(sd_event_unref, sd_event *(sd_event *));
+
+    MOCK_CONST_METHOD1(sd_event_loop, int(sd_event *));
+};
+
+} // namespace sdeventplus
diff --git a/test/Makefile.am b/test/Makefile.am
new file mode 100644
index 0000000..7efd9b2
--- /dev/null
+++ b/test/Makefile.am
@@ -0,0 +1,26 @@
+@VALGRIND_CHECK_RULES@
+@CODE_COVERAGE_RULES@
+
+AM_CPPFLAGS = -I$(top_builddir)/src -I$(top_srcdir)/src \
+              $(GTEST_CFLAGS) $(GMOCK_CFLAGS) $(SYSTEMD_CFLAGS) \
+              $(CODE_COVERAGE_CPPFLAGS)
+AM_CFLAGS = $(CODE_COVERAGE_CFLAGS)
+AM_CXXFLAGS = $(CODE_COVERAGE_CXXFLAGS)
+test_ldadd = $(top_builddir)/src/libsdeventplus.la $(SYSTEMD_LIBS) \
+             $(CODE_COVERAGE_LIBS)
+gtest_ldadd = $(test_ldadd) $(GTEST_LIBS) $(GMOCK_LIBS) -lgmock_main
+
+check_PROGRAMS =
+TESTS = $(check_PROGRAMS)
+
+check_PROGRAMS += event
+event_SOURCES = event.cpp
+event_LDADD = $(gtest_ldadd)
+
+check_PROGRAMS += exception
+exception_SOURCES = exception.cpp
+exception_LDADD = $(gtest_ldadd)
+
+check_PROGRAMS += sdref
+sdref_SOURCES = sdref.cpp
+sdref_LDADD = $(gtest_ldadd)
diff --git a/test/event.cpp b/test/event.cpp
new file mode 100644
index 0000000..da935cf
--- /dev/null
+++ b/test/event.cpp
@@ -0,0 +1,96 @@
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <sdeventplus/event.hpp>
+#include <sdeventplus/exception.hpp>
+#include <sdeventplus/test/sdevent.hpp>
+#include <type_traits>
+
+namespace sdeventplus
+{
+namespace
+{
+
+using testing::DoAll;
+using testing::Return;
+using testing::SetArgPointee;
+
+class EventTest : public testing::Test
+{
+  protected:
+    testing::StrictMock<SdEventMock> mock;
+    sd_event *const expected_event = reinterpret_cast<sd_event *>(1234);
+};
+
+TEST_F(EventTest, NewEventRef)
+{
+    EXPECT_CALL(mock, sd_event_ref(expected_event))
+        .WillOnce(Return(expected_event));
+    Event event(expected_event, &mock);
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event)).WillOnce(Return(nullptr));
+}
+
+TEST_F(EventTest, NewEventNoRef)
+{
+    Event event(expected_event, std::false_type(), &mock);
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event)).WillOnce(Return(nullptr));
+}
+
+TEST_F(EventTest, GetNewEvent)
+{
+    EXPECT_CALL(mock, sd_event_new(testing::_))
+        .WillOnce(DoAll(SetArgPointee<0>(expected_event), Return(0)));
+    Event event = Event::get_new(&mock);
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event)).WillOnce(Return(nullptr));
+}
+
+TEST_F(EventTest, GetNewEventFail)
+{
+    EXPECT_CALL(mock, sd_event_new(testing::_)).WillOnce(Return(-EINVAL));
+    EXPECT_THROW(Event::get_new(&mock), SdEventError);
+}
+
+TEST_F(EventTest, GetDefaultEvent)
+{
+    EXPECT_CALL(mock, sd_event_default(testing::_))
+        .WillOnce(DoAll(SetArgPointee<0>(expected_event), Return(0)));
+    Event event = Event::get_default(&mock);
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event)).WillOnce(Return(nullptr));
+}
+
+TEST_F(EventTest, GetDefaultEventFail)
+{
+    EXPECT_CALL(mock, sd_event_default(testing::_)).WillOnce(Return(-EINVAL));
+    EXPECT_THROW(Event::get_default(&mock), SdEventError);
+}
+
+TEST_F(EventTest, LoopSuccess)
+{
+    EXPECT_CALL(mock, sd_event_loop(expected_event)).WillOnce(Return(0));
+    EXPECT_CALL(mock, sd_event_unref(expected_event)).WillOnce(Return(nullptr));
+    EXPECT_EQ(0, Event(expected_event, std::false_type(), &mock).loop());
+}
+
+TEST_F(EventTest, LoopUserError)
+{
+    const int user_error = 10;
+    EXPECT_CALL(mock, sd_event_loop(expected_event))
+        .WillOnce(Return(user_error));
+    EXPECT_CALL(mock, sd_event_unref(expected_event)).WillOnce(Return(nullptr));
+    EXPECT_EQ(user_error,
+              Event(expected_event, std::false_type(), &mock).loop());
+}
+
+TEST_F(EventTest, LoopInternalError)
+{
+    EXPECT_CALL(mock, sd_event_loop(expected_event)).WillOnce(Return(-EINVAL));
+    EXPECT_CALL(mock, sd_event_unref(expected_event)).WillOnce(Return(nullptr));
+    EXPECT_THROW(Event(expected_event, std::false_type(), &mock).loop(),
+                 SdEventError);
+}
+
+} // namespace
+} // namespace sdeventplus
diff --git a/test/exception.cpp b/test/exception.cpp
new file mode 100644
index 0000000..050513c
--- /dev/null
+++ b/test/exception.cpp
@@ -0,0 +1,25 @@
+#include <gtest/gtest.h>
+#include <sdeventplus/exception.hpp>
+#include <string>
+#include <system_error>
+
+namespace sdeventplus
+{
+namespace
+{
+
+TEST(ExceptionTest, Construct)
+{
+    const int code = EINTR;
+    const char *const prefix = "construct_test";
+
+    std::system_error expected(code, std::generic_category(), prefix);
+    SdEventError err(code, prefix);
+
+    EXPECT_EQ(std::string{expected.what()}, err.what());
+    EXPECT_EQ(code, err.code().value());
+    EXPECT_EQ(std::generic_category(), err.code().category());
+}
+
+} // namespace
+} // namespace sdeventplus
diff --git a/test/sdref.cpp b/test/sdref.cpp
new file mode 100644
index 0000000..6bb5410
--- /dev/null
+++ b/test/sdref.cpp
@@ -0,0 +1,198 @@
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <sdeventplus/sdevent.hpp>
+#include <sdeventplus/sdref.hpp>
+#include <sdeventplus/test/sdevent.hpp>
+#include <systemd/sd-event.h>
+#include <type_traits>
+#include <utility>
+
+namespace sdeventplus
+{
+namespace
+{
+
+class SdRefTest : public testing::Test
+{
+  protected:
+    sd_event *const expected_event = reinterpret_cast<sd_event *>(1234);
+    sd_event *const expected_event2 = reinterpret_cast<sd_event *>(2345);
+    testing::StrictMock<SdEventMock> mock;
+    testing::StrictMock<SdEventMock> mock2;
+};
+
+TEST_F(SdRefTest, ConstructRef)
+{
+    EXPECT_CALL(mock, sd_event_ref(expected_event))
+        .WillOnce(testing::Return(expected_event));
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, &mock);
+    EXPECT_EQ(expected_event, event.get());
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .WillOnce(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, ConstructNoRef)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .WillOnce(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, CopyConstruct)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+
+    EXPECT_CALL(mock, sd_event_ref(expected_event))
+        .WillOnce(testing::Return(expected_event));
+    SdRef<sd_event> event2(event);
+    EXPECT_EQ(expected_event, event2.get());
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .Times(2)
+        .WillRepeatedly(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, MoveConstruct)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+
+    SdRef<sd_event> event2(std::move(event));
+    EXPECT_EQ(expected_event, event2.get());
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .WillOnce(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, CopyAssignOverValid)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+    SdRef<sd_event> event2(expected_event2, &SdEventInterface::sd_event_ref,
+                           &SdEventInterface::sd_event_unref, std::false_type(),
+                           &mock2);
+    EXPECT_EQ(expected_event2, event2.get());
+
+    EXPECT_CALL(mock2, sd_event_unref(expected_event2))
+        .WillOnce(testing::Return(nullptr));
+    EXPECT_CALL(mock, sd_event_ref(expected_event))
+        .WillOnce(testing::Return(expected_event));
+    event2 = event;
+    EXPECT_EQ(expected_event, event2.get());
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .Times(2)
+        .WillRepeatedly(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, CopyAssignOverMoved)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+    SdRef<sd_event> event2(expected_event2, &SdEventInterface::sd_event_ref,
+                           &SdEventInterface::sd_event_unref, std::false_type(),
+                           &mock2);
+    EXPECT_EQ(expected_event2, event2.get());
+    {
+        SdRef<sd_event> event_mover(std::move(event2));
+        EXPECT_EQ(expected_event2, event_mover.get());
+
+        EXPECT_CALL(mock2, sd_event_unref(expected_event2))
+            .WillOnce(testing::Return(nullptr));
+    }
+
+    EXPECT_CALL(mock, sd_event_ref(expected_event))
+        .WillOnce(testing::Return(expected_event));
+    event2 = event;
+    EXPECT_EQ(expected_event, event2.get());
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .Times(2)
+        .WillRepeatedly(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, CopySelf)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+
+    event = event;
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .WillOnce(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, MoveAssignOverValid)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+    SdRef<sd_event> event2(expected_event2, &SdEventInterface::sd_event_ref,
+                           &SdEventInterface::sd_event_unref, std::false_type(),
+                           &mock2);
+    EXPECT_EQ(expected_event2, event2.get());
+
+    EXPECT_CALL(mock2, sd_event_unref(expected_event2))
+        .WillOnce(testing::Return(nullptr));
+    event2 = std::move(event);
+    EXPECT_EQ(expected_event, event2.get());
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .WillOnce(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, MoveAssignOverMoved)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+    SdRef<sd_event> event2(expected_event2, &SdEventInterface::sd_event_ref,
+                           &SdEventInterface::sd_event_unref, std::false_type(),
+                           &mock2);
+    EXPECT_EQ(expected_event2, event2.get());
+    {
+        SdRef<sd_event> event_mover(std::move(event2));
+        EXPECT_EQ(expected_event2, event_mover.get());
+
+        EXPECT_CALL(mock2, sd_event_unref(expected_event2))
+            .WillOnce(testing::Return(nullptr));
+    }
+
+    event2 = std::move(event);
+    EXPECT_EQ(expected_event, event2.get());
+
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .WillOnce(testing::Return(nullptr));
+}
+
+TEST_F(SdRefTest, MoveSelf)
+{
+    SdRef<sd_event> event(expected_event, &SdEventInterface::sd_event_ref,
+                          &SdEventInterface::sd_event_unref, std::false_type(),
+                          &mock);
+    EXPECT_EQ(expected_event, event.get());
+    event = std::move(event);
+    EXPECT_CALL(mock, sd_event_unref(expected_event))
+        .WillOnce(testing::Return(nullptr));
+}
+
+} // namespace
+} // namespace sdeventplus