plat_sem_destroy(&q->items_sem);

base.h

@@ -97,6 +97,8 @@ typedef double f64;
 
 #if defined(_WIN32) || defined(_WIN64)
 
+// Memory allocation
+
 static u32 plat_get_pagesize(void) {
   SYSTEM_INFO sysinfo = {0};
   GetSystemInfo(&sysinfo);
@@ -121,8 +123,35 @@ static b32 plat_mem_release(void *ptr, u64 size) {
   return VirtualFree(ptr, size, MEM_RELEASE);
 }
 
+// Semaphores
+typedef struct plat_sem {
+  HANDLE handle;
+} plat_sem;
+
+static b32 plat_sem_init(plat_sem *s, u32 initial) {
+  s->handle = CreateSemaphore(NULL, initial, LONG_MAX, NULL);
+  return s->handle != NULL;
+}
+
+static void plat_sem_wait(plat_sem *s) {
+  WaitForSingleObject(s->handle, INFINITE);
+}
+
+static void plat_sem_post(plat_sem *s, u32 count) {
+  ReleaseSemaphore(s->handle, count, NULL);
+}
+
+static void plat_sem_destroy(plat_sem *s) {
+  if (s->handle) {
+    CloseHandle(s->handle);
+    s->handle = NULL;
+  }
+}
+
 #elif defined(__linux__)
 
+// Memory allocation
+
 #ifndef _DEFAULT_SOURCE
 #define _DEFAULT_SOURCE
 #endif
@@ -158,4 +187,28 @@ static b32 plat_mem_release(void *ptr, u64 size) {
   return ret == 0;
 }
 
+// Semaphores
+#include <semaphore.h>
+
+typedef struct plat_sem {
+  sem_t sem;
+} plat_sem;
+
+static b32 plat_sem_init(plat_sem *s, u32 initial) {
+  return sem_init(&s->sem, 0, initial) == 0;
+}
+
+static void plat_sem_wait(plat_sem *s) {
+  while (sem_wait(&s->sem) == -1 && errno == EINTR) {
+  }
+}
+
+static void plat_sem_post(plat_sem *s, u32 count) {
+  for (u32 i = 0; i < count; i++) {
+    sem_post(&s->sem);
+  }
+}
+
+static void plat_sem_destroy(plat_sem *s) { sem_destroy(&s->sem); }
+
 #endif