Basic semaphore emulation and defines for GNU/Hurd

src/xpdev/genwrap.c

@@ -123,7 +123,7 @@ void DLLCALL unix_beep(int freq, int dur)
 {
 	static int console_fd=-1;
 
-#if !defined(__OpenBSD__)
+#if !defined(__OpenBSD__) && !defined(__GNU__)
 	if(console_fd == -1) 
   		console_fd = open("/dev/console", O_NOCTTY);
 	

src/xpdev/genwrap.h

@@ -106,6 +106,8 @@ extern "C" {
 	#define PLATFORM_DESC	"Solaris"
 #elif defined(__sun__)
 	#define PLATFORM_DESC	"SunOS"
+#elif defined(__gnu__)
+	#define PLATFORM_DESC	"GNU/Hurd"
 #elif defined(__unix__)
 	#define PLATFORM_DESC	"Unix"
 #else

src/xpdev/sem.c

+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "genwrap.h"
+#include "sem.h"
+
+int sem_init(sem_t *sem, int pshared, unsigned int value)  {
+	sem=malloc(sizeof(sem_t));
+	if(sem==NULL)  {
+		errno=ENOSPC;
+		return(-1);
+	}
+	if(pipe((int *)sem)) {
+		errno=EPERM;
+		return(-1);
+	}
+	return(0);
+}
+
+int sem_destroy(sem_t *sem)  {
+	close(sem->read);
+	close(sem->write);
+	sem=NULL;
+	return(0);
+}
+
+int sem_post(sem_t *sem)  {
+	if(sem==NULL)  {
+		errno=EINVAL;
+		return(-1);
+	}
+	write(sem->write,"-",1)==1;
+	return(0);
+}
+
+int sem_wait(sem_t *sem)  {
+	char	buf;
+	if(sem==NULL) {
+		errno=EINVAL;
+		return(-1);
+	}
+	while(read(sem->read,&buf,1)<1)
+		SLEEP(1);
+	return(0);
+}

src/xpdev/sem.h

+typedef struct {
+	int read;
+	int write;
+}  sem_t;
+
+int sem_init(sem_t *sem, int pshared, unsigned int value);
+int sem_destroy(sem_t *sem);
+int sem_post(sem_t *sem);
+int sem_wait(sem_t *sem);
+

src/xpdev/threadwrap.h

@@ -48,7 +48,11 @@ extern "C" {
 #if defined(__unix__)
 
 	#include <pthread.h>	/* POSIX threads and mutexes */
+#if defined(_NEED_SEM)
+	#include "sem.h"
+#else
 	#include <semaphore.h>	/* POSIX semaphores */
+#endif
 	ulong _beginthread(void( *start_address )( void * )
 		,unsigned stack_size, void *arglist);