Fix Windows CI: timespec guard + server stdatomic/pthread shim

Author: unamedkr

quant.h

@@ -144,7 +144,10 @@ typedef volatile long atomic_int;
 #ifndef CLOCK_MONOTONIC
 #define CLOCK_MONOTONIC 1
 #endif
+#ifndef _TIMESPEC_DEFINED
+#define _TIMESPEC_DEFINED
 struct timespec { long tv_sec; long tv_nsec; };
+#endif
 static inline int clock_gettime(int id, struct timespec* ts) {
     (void)id; LARGE_INTEGER f, c;
     QueryPerformanceFrequency(&f); QueryPerformanceCounter(&c);

src/server/tq_server.c

@@ -18,11 +18,26 @@
 #include <string.h>
 #include <stdarg.h>
 #include <stdbool.h>
+#if defined(_MSC_VER)
+#include <intrin.h>
+typedef volatile long atomic_int;
+#define atomic_store(p, v) _InterlockedExchange((p), (v))
+#define atomic_load(p) _InterlockedCompareExchange((p), 0, 0)
+#else
 #include <stdatomic.h>
+#endif
 #include <signal.h>
 #include <errno.h>
 #include <time.h>
+#ifdef _WIN32
+#include <windows.h>
+#define pthread_mutex_t SRWLOCK
+#define PTHREAD_MUTEX_INITIALIZER SRWLOCK_INIT
+#define pthread_mutex_lock(m) AcquireSRWLockExclusive(m)
+#define pthread_mutex_unlock(m) ReleaseSRWLockExclusive(m)
+#else
 #include <pthread.h>
+#endif
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/types.h>