update fifo.c

Signed-off-by: surenyi <surenyi82@163.com>

src/fifo.c

@@ -2,7 +2,11 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
+#ifdef _WIN32
+#include <windows.h>
+#else
 #include <pthread.h>
+#endif
 #include "fifo.h"
 
 #define is_power_of_2(x) (((x) != 0) && (((x) & (x - 1)) == 0))
@@ -13,13 +17,24 @@ struct fifo {
 	int size;
 	int in;
 	int out;
+#ifdef _WIN32
+    CRITICAL_SECTION lock;
+#else
 	pthread_spinlock_t lock;
+#endif
 };
 
+#ifdef _WIN32
+#define SPIN_INIT(fxo)    InitializeCriticalSection(&fxo->lock)
+#define SPIN_RELEASE(fxo) DeleteCriticalSection(&fxo->lock)
+#define SPIN_LOCK(fxo)    EnterCriticalSection(&fxo->lock)
+#define SPIN_UNLOCK(fxo)  LeaveCriticalSection(&fxo->lock)
+#else
 #define SPIN_INIT(fxo)    pthread_spin_init(&fxo->lock, PTHREAD_PROCESS_PRIVATE)
 #define SPIN_RELEASE(fxo) pthread_spin_destroy(&fxo->lock)
 #define SPIN_LOCK(fxo)    pthread_spin_lock(&fxo->lock)
 #define SPIN_UNLOCK(fxo)  pthread_spin_unlock(&fxo->lock)
+#endif
 
 static unsigned int roundup_pow_of_two(unsigned int x)
 {