Move platform specific code & make sleep platform independent

CMakeLists.txt

@@ -10,6 +10,8 @@ add_executable(csnake
   src/screen.c
   src/input.c
   src/player.c
+  src/platform.c
+  src/sleep.c
 )
 
 set_target_properties(csnake PROPERTIES C_STANDARD 99)

Makefile

@@ -4,7 +4,7 @@ INCLUDE = -Iinclude
 RM  = rm -f
 SRCDIR = src
 OBJDIR = obj
-SRC = main.c screen.c input.c player.c
+SRC = main.c screen.c input.c player.c platform.c sleep.c
 OBJ = $(addprefix $(OBJDIR)/,$(SRC:.c=.o))
 
 all: $(OUT)

include/platform.h

@@ -0,0 +1,11 @@
+#ifndef __PLATFORM_H__
+#define __PLATFORM_H__
+
+void resetCoordinates(void);
+#ifdef _WIN32
+void threadCreate(void (*function)(void *), void *args);
+#else
+void threadCreate(void *(*function)(void *), void *args);
+#endif
+
+#endif /* __PLATFORM_H__ */

include/sleep.h

@@ -0,0 +1,6 @@
+#ifndef __SLEEP_H__
+#define __SLEEP_H__
+
+void sleepMS(int msec);
+
+#endif /* __SLEEP_H__ */

src/main.c

@@ -2,18 +2,14 @@
 #include <stdlib.h>
 #include <stdbool.h>
 #include <time.h>
-#ifdef _WIN32
-#include <Windows.h>
-#include <process.h>
-#else
-#include <pthread.h>
-#endif
 
 #include "input.h"
 #include "screen.h"
 #include "player.h"
 #include "food.h"
 #include "config.h"
+#include "platform.h"
+#include "sleep.h"
 
 void drawPlayer(Player *player, Screen *screen)
 {
@@ -32,19 +28,6 @@ Food generateFood(Player *player)
     return food;
 }
 
-#ifdef _WIN32
-void resetCoordinates(void)
-{
-    HANDLE output = GetStdHandle(STD_OUTPUT_HANDLE);
-    SetConsoleCursorPosition(output, (COORD){0});
-}
-#else
-void resetCoordinates(void)
-{
-    printf("\e[1;1H\e[2J");
-}
-#endif
-
 int main(int argc, char **argv)
 {
     srand((unsigned int)time(NULL));
@@ -59,12 +42,7 @@ int main(int argc, char **argv)
     bool stopped = false;
     InputArgs input_args = (InputArgs){ key, running };
 
-#ifdef _WIN32
-    _beginthread(input, 0, &input_args);
-#else
-    pthread_t input_thread;
-    pthread_create(&input_thread, NULL, input, &input_args);
-#endif
+    threadCreate(input, &input_args);
     while (*running)
     {
         screenSet(screen, ' ');
@@ -75,11 +53,7 @@ int main(int argc, char **argv)
         for (i = 0; i < SIZE*2; ++i) putchar('-');
         printf("\nScore: %d\n", player->score);
 
-#ifdef _WIN32
-        Sleep(1000L);
-#else
-        nanosleep(&(struct timespec){.tv_sec = 1}, NULL);
-#endif
+        sleepMS(1000);
         switch (*key)
         {
             case 'q':

src/platform.c

@@ -0,0 +1,32 @@
+#ifdef _WIN32
+#include <Windows.h>
+#include <process.h>
+#else
+#include <stdio.h>
+#include <pthread.h>
+#endif
+
+#ifdef _WIN32
+void resetCoordinates(void)
+{
+    HANDLE output = GetStdHandle(STD_OUTPUT_HANDLE);
+    SetConsoleCursorPosition(output, (COORD){0});
+}
+#else
+void resetCoordinates(void)
+{
+    printf("\e[1;1H\e[2J");
+}
+#endif
+
+#ifdef _WIN32
+void threadCreate(void (*function)(void *), void *args)
+{
+    _beginthread(function, 0, args);
+}
+#else
+void threadCreate(void *(*function)(void *), void *args)
+{
+    pthread_create(&(pthread_t){0}, 0, function, args);
+}
+#endif

src/sleep.c

@@ -0,0 +1,14 @@
+#include <time.h>
+
+long long int getMS()
+{
+    struct timespec ts;
+    timespec_get(&ts, TIME_UTC);
+    return ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+}
+
+void sleepMS(int msec)
+{
+    long long int end = getMS() + msec;
+    while (getMS() < end);
+}