From 189500733583cc2b9f601d6053a57e944279fcf3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alf-Andr=C3=A9=20Walla?= <fwsgonzo@hotmail.com>
Date: Sun, 7 Jun 2020 15:52:53 +0200
Subject: [PATCH] Make shared default, use monotonic on other systems for time

---
 engine/src/script.cpp | 16 ++++++++++------
 engine/src/script.hpp |  4 ++--
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/engine/src/script.cpp b/engine/src/script.cpp
index 1dced6d..ed6b82b 100644
--- a/engine/src/script.cpp
+++ b/engine/src/script.cpp
@@ -22,12 +22,12 @@ Script::Script(const riscv::Machine<riscv::RISCV32>& smach,
 	const std::string& name)
 	: m_source_machine(smach), m_name(name), m_hash(crc32(name.c_str()))
 {
-	this->reset(true);
+	this->reset();
 }
 
 Script::~Script() {}
 
-bool Script::reset(bool shared)
+bool Script::reset()
 {
 	try {
 		riscv::MachineOptions<riscv::RISCV32> options {
@@ -42,7 +42,7 @@ bool Script::reset(bool shared)
 		// TODO: shutdown engine?
 		exit(1);
 	}
-	if (this->machine_initialize(shared)) {
+	if (this->machine_initialize()) {
 		this->m_crashed = false;
 		return true;
 	}
@@ -69,12 +69,12 @@ void Script::add_shared_memory()
 	mem.install_shared_page(HIDDEN_AREA >> riscv::Page::SHIFT, g_hidden_stack);
 }
 
-bool Script::machine_initialize(bool shared)
+bool Script::machine_initialize()
 {
 	// setup system calls and traps
 	this->machine_setup(machine());
 	// install the shared memory area
-	if (shared) this->add_shared_memory();
+	this->add_shared_memory();
 	// clear some state belonging to previous initialization
 	this->m_tick_event = 0;
 	// run through the initialization
@@ -288,7 +288,11 @@ long Script::measure(uint32_t address)
 timespec time_now()
 {
 	timespec t;
-	clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &t);
+#ifdef __linux__
+	clock_gettime(CLOCK_THREAD_CPUTIME_ID, &t);
+#else
+	clock_gettime(CLOCK_MONOTONIC, &t);
+#endif
 	return t;
 }
 long nanodiff(timespec start_time, timespec end_time)
diff --git a/engine/src/script.hpp b/engine/src/script.hpp
index 9d75479..156c290 100644
--- a/engine/src/script.hpp
+++ b/engine/src/script.hpp
@@ -36,7 +36,7 @@ class Script {
 	bool crashed() const noexcept { return m_crashed; }
 
 	void  add_shared_memory();
-	bool  reset(bool shared); // true if the reset was successful
+	bool  reset(); // true if the reset was successful
 
 	void hash_public_api_symbols(const std::string& file);
 	std::string symbol_name(uint32_t address) const;
@@ -59,7 +59,7 @@ class Script {
 	void handle_exception(uint32_t);
 	void handle_timeout(uint32_t);
 	bool install_binary(const std::string& file, bool shared = true);
-	bool machine_initialize(bool shared);
+	bool machine_initialize();
 	void machine_setup(riscv::Machine<riscv::RISCV32>&);
 	void setup_syscall_interface(riscv::Machine<riscv::RISCV32>&);
 	static std::array<riscv::Page, 2> g_shared_area; // shared memory area