From 1157ab06d284f38cb20f81886a10be5188713594 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Sun, 31 May 2015 23:49:31 -0700
Subject: [PATCH] Perf: Ability to load savestates immediately on launch

---
 CHANGES                  |  1 +
 src/platform/perf-main.c | 31 ++++++++++++++++++++++++++++---
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/CHANGES b/CHANGES
index 515d9314a..b665c2883 100644
--- a/CHANGES
+++ b/CHANGES
@@ -51,6 +51,7 @@ Misc:
  - Qt: Unified file opening and saving with last location
  - Qt: Fix windows being resizable when they shouldn't have been
  - Qt: Only hide cursor in full screen
+ - Perf: Ability to load savestates immediately on launch
 
 0.2.1: (2015-05-13)
 Bugfixes:
diff --git a/src/platform/perf-main.c b/src/platform/perf-main.c
index 795bb8506..80aa60211 100644
--- a/src/platform/perf-main.c
+++ b/src/platform/perf-main.c
@@ -7,8 +7,10 @@
 #include "gba/supervisor/config.h"
 #include "gba/gba.h"
 #include "gba/renderers/video-software.h"
+#include "gba/serialize.h"
 
 #include "platform/commandline.h"
+#include "util/vfs.h"
 
 #include <errno.h>
 #include <fcntl.h>
@@ -16,27 +18,31 @@
 #include <inttypes.h>
 #include <sys/time.h>
 
-#define PERF_OPTIONS "F:NPS:"
+#define PERF_OPTIONS "F:L:NPS:"
 #define PERF_USAGE \
 	"\nBenchmark options:\n" \
 	"  -F FRAMES        Run for the specified number of FRAMES before exiting\n" \
 	"  -N               Disable video rendering entirely\n" \
 	"  -P               CSV output, useful for parsing\n" \
-	"  -S SEC           Run for SEC in-game seconds before exiting"
+	"  -S SEC           Run for SEC in-game seconds before exiting\n" \
+	"  -L FILE          Load a savestate when starting the test"
 
 struct PerfOpts {
 	bool noVideo;
 	bool csv;
 	unsigned duration;
 	unsigned frames;
+	char* savestate;
 };
 
 static void _GBAPerfRunloop(struct GBAThread* context, int* frames, bool quiet);
 static void _GBAPerfShutdown(int signal);
 static bool _parsePerfOpts(struct SubParser* parser, struct GBAConfig* config, int option, const char* arg);
+static void _loadSavestate(struct GBAThread* context);
 
 static struct GBAThread* _thread;
 static bool _dispatchExiting = false;
+static struct VFile* _savestate = 0;
 
 int main(int argc, char** argv) {
 	signal(SIGINT, _GBAPerfShutdown);
@@ -44,7 +50,7 @@ int main(int argc, char** argv) {
 	struct GBAVideoSoftwareRenderer renderer;
 	GBAVideoSoftwareRendererCreate(&renderer);
 
-	struct PerfOpts perfOpts = { false, false, 0, 0 };
+	struct PerfOpts perfOpts = { false, false, 0, 0, 0 };
 	struct SubParser subparser = {
 		.usage = PERF_USAGE,
 		.parse = _parsePerfOpts,
@@ -80,6 +86,13 @@ int main(int argc, char** argv) {
 	if (!perfOpts.noVideo) {
 		context.renderer = &renderer.d;
 	}
+	if (perfOpts.savestate) {
+		_savestate = VFileOpen(perfOpts.savestate, O_RDONLY);
+		free(perfOpts.savestate);
+	}
+	if (_savestate) {
+		context.startCallback = _loadSavestate;
+	}
 
 	context.debugger = createDebugger(&args, &context);
 	context.overrides = GBAConfigGetOverrides(&config);
@@ -134,6 +147,9 @@ int main(int argc, char** argv) {
 	}
 
 cleanup:
+	if (_savestate) {
+		_savestate->close(_savestate);
+	}
 	GBAConfigFreeOpts(&opts);
 	freeArguments(&args);
 	GBAConfigDeinit(&config);
@@ -205,7 +221,16 @@ static bool _parsePerfOpts(struct SubParser* parser, struct GBAConfig* config, i
 	case 'S':
 		opts->duration = strtoul(arg, 0, 10);
 		return !errno;
+	case 'L':
+		opts->savestate = strdup(arg);
+		return true;
 	default:
 		return false;
 	}
 }
+
+static void _loadSavestate(struct GBAThread* context) {
+	GBALoadStateNamed(context->gba, _savestate);
+	_savestate->close(_savestate);
+	_savestate = 0;
+}