From 39653e366add5d9f4b3d284606a892f5ecbe6495 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Hrdli=C4=8Dka?= <dhrdlicka@users.noreply.github.com>
Date: Sat, 18 Sep 2021 18:39:36 +0200
Subject: [PATCH] Fix pthreads on non-MinGW Windows builds - Use C11 standard
 `timespec_get` instead of `clock_gettime` - Remove the unused `thread_sleep`
 function

---
 CMakeLists.txt |  7 +++++++
 src/thread.c   | 36 +++++-------------------------------
 2 files changed, 12 insertions(+), 31 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1e565b001..8f2382dcb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,4 +104,11 @@ if(MSVC_TOOLSET_VERSION GREATER_EQUAL 142 AND ARCH STREQUAL "arm64")
 	endif()
 endif()
 
+# HACK: MinGW does not have `timespec_get`
+include(CheckSymbolExists)
+check_symbol_exists(timespec_get time.h HAS_TIMESPEC_GET)
+if(HAS_TIMESPEC_GET)
+	add_compile_definitions(HAS_TIMESPEC_GET)
+endif()
+
 add_subdirectory(src)
diff --git a/src/thread.c b/src/thread.c
index b5151e573..8dd321c88 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -2,17 +2,14 @@
 #include <stdio.h>
 #include <time.h>
 #include <pthread.h>
-#ifndef _MSC_VER
-#include <sys/param.h>
-#include <unistd.h>
-#endif
-#ifdef _WIN32
-#include <windows.h>
-#endif
 #include <inttypes.h>
 #include <86box/86box.h>
 #include <86box/plat.h>
 
+#ifndef HAS_TIMESPEC_GET
+# define timespec_get(ts, _)	clock_gettime(CLOCK_REALTIME, ts)
+#endif
+
 
 typedef struct event_pthread_t
 {
@@ -108,25 +105,13 @@ thread_wait_event(event_t *handle, int timeout)
     event_pthread_t *event = (event_pthread_t *)handle;
     struct timespec abstime;
 
-#ifdef _MSC_VER
-    /* Taken from https://stackoverflow.com/a/31335254 with some modifications. */
-    FILETIME systime;
-    uint64_t systimeint = 0;
-    GetSystemTimeAsFileTime(&systime);
-    systimeint |= systime.dwLowDateTime;
-    systimeint |= (uint64_t)systime.dwHighDateTime << 32i64;
-    systimeint -= 116444736000000000i64;
-    abstime.tv_sec = systimeint / 10000000i64;
-    abstime.tv_nsec = systimeint % 10000000i64 * 100;
-#else
-    clock_gettime(CLOCK_REALTIME, &abstime);
+    timespec_get(&abstime, TIME_UTC);
     abstime.tv_nsec += (timeout % 1000) * 1000000;
     abstime.tv_sec += (timeout / 1000);
     if (abstime.tv_nsec > 1000000000) {
 	abstime.tv_nsec -= 1000000000;
 	abstime.tv_sec++;
     }
-#endif
 
     pthread_mutex_lock(&event->mutex);
     if (timeout == -1) {
@@ -152,17 +137,6 @@ thread_destroy_event(event_t *handle)
 }
 
 
-void
-thread_sleep(int t)
-{
-#ifdef _WIN32
-    Sleep(t);
-#else
-    usleep(t * 1000);
-#endif
-}
-
-
 mutex_t *
 thread_create_mutex(void)
 {