Update lightweightsemaphore.h

... to support building on zOS.

Signed-off-by: v1gnesh <v1gnesh@users.noreply.github.com>

Author: v1gnesh

lightweightsemaphore.h

@@ -28,8 +28,6 @@ extern "C" {
 #include <zos-semaphore.h>
 #elif defined(__unix__)
 #include <semaphore.h>
-#elif defined(__MVS__)
-#include <zos-semaphore.h>
 
 #if defined(__GLIBC_PREREQ) && defined(_GNU_SOURCE)
 #if __GLIBC_PREREQ(2,30)
@@ -257,80 +255,6 @@ class Semaphore
 		}
 	}
 };
-#elif defined(__MVS__)
-        //---------------------------------------------------------
-// Semaphore (MVS aka z/OS)
-//---------------------------------------------------------
-class Semaphore
-{
-private:
-	sem_t m_sema;
-
-	Semaphore(const Semaphore& other) MOODYCAMEL_DELETE_FUNCTION;
-	Semaphore& operator=(const Semaphore& other) MOODYCAMEL_DELETE_FUNCTION;
-
-public:
-	Semaphore(int initialCount = 0)
-	{
-		assert(initialCount >= 0);
-		int rc = sem_init(&m_sema, 0, initialCount);
-		assert(rc == 0);
-		(void)rc;
-	}
-
-	~Semaphore()
-	{
-		sem_destroy(&m_sema);
-	}
-
-	bool wait()
-	{
-		// http://stackoverflow.com/questions/2013181/gdb-causes-sem-wait-to-fail-with-eintr-error
-		int rc;
-		do {
-			rc = sem_wait(&m_sema);
-		} while (rc == -1 && errno == EINTR);
-		return rc == 0;
-	}
-
-	bool try_wait()
-	{
-		int rc;
-		do {
-			rc = sem_trywait(&m_sema);
-		} while (rc == -1 && errno == EINTR);
-		return rc == 0;
-	}
-
-	bool timed_wait(std::uint64_t usecs)
-	{
-		struct timespec ts;
-		const int usecs_in_1_sec = 1000000;
-		const int nsecs_in_1_sec = 1000000000;
-
-		ts.tv_sec = usecs / usecs_in_1_sec;
-		ts.tv_nsec = (usecs % usecs_in_1_sec) * 1000;
-
-		int rc;
-		do {
-			rc = sem_timedwait(&m_sema, &ts);
-		} while (rc == -1 && errno == EINTR);
-		return rc == 0;
-	}
-
-	void signal()
-	{
-		while (sem_post(&m_sema) == -1);
-	}
-
-	void signal(int count)
-	{
-		while (count-- > 0)
-		{
-			while (sem_post(&m_sema) == -1);
-		}
-	}
-};
 #else
 #error Unsupported platform! (No semaphore wrapper available)
 #endif