ams: support building unit test programs on windows/linux/macos

libraries/libstratosphere/source/sm/sm_ams.os.horizon.h

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+/**
+ * @file sm_ams.h
+ * @brief Service manager (sm) IPC wrapper for Atmosphere extensions.
+ * @author SciresM
+ * @copyright libnx Authors
+ */
+#pragma once
+
+#if defined(ATMOSPHERE_OS_HORIZON)
+
+#include <switch.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+Result smAtmosphereHasService(bool *out, SmServiceName name);
+Result smAtmosphereWaitService(SmServiceName name);
+Result smAtmosphereHasMitm(bool *out, SmServiceName name);
+Result smAtmosphereWaitMitm(SmServiceName name);
+
+Result smAtmosphereMitmInitialize(void);
+void smAtmosphereMitmExit(void);
+TipcService *smAtmosphereMitmGetServiceSession();
+
+Result smAtmosphereOpenSession(TipcService *out);
+void smAtmosphereCloseSession(TipcService *srv);
+
+Result smAtmosphereMitmInstall(TipcService *fwd_srv, Handle *handle_out, Handle *query_out, SmServiceName name);
+Result smAtmosphereMitmUninstall(SmServiceName name);
+Result smAtmosphereMitmDeclareFuture(SmServiceName name);
+Result smAtmosphereMitmClearFuture(SmServiceName name);
+Result smAtmosphereMitmAcknowledgeSession(Service *srv_out, void *info_out, SmServiceName name);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif