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-rw-r--r--include/uapi/linux/sem.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/include/uapi/linux/sem.h b/include/uapi/linux/sem.h
new file mode 100644
index 000000000..dd73b908b
--- /dev/null
+++ b/include/uapi/linux/sem.h
@@ -0,0 +1,92 @@
+#ifndef _UAPI_LINUX_SEM_H
+#define _UAPI_LINUX_SEM_H
+
+#include <linux/ipc.h>
+
+/* semop flags */
+#define SEM_UNDO 0x1000 /* undo the operation on exit */
+
+/* semctl Command Definitions. */
+#define GETPID 11 /* get sempid */
+#define GETVAL 12 /* get semval */
+#define GETALL 13 /* get all semval's */
+#define GETNCNT 14 /* get semncnt */
+#define GETZCNT 15 /* get semzcnt */
+#define SETVAL 16 /* set semval */
+#define SETALL 17 /* set all semval's */
+
+/* ipcs ctl cmds */
+#define SEM_STAT 18
+#define SEM_INFO 19
+
+/* Obsolete, used only for backwards compatibility and libc5 compiles */
+struct semid_ds {
+ struct ipc_perm sem_perm; /* permissions .. see ipc.h */
+ __kernel_time_t sem_otime; /* last semop time */
+ __kernel_time_t sem_ctime; /* last change time */
+ struct sem *sem_base; /* ptr to first semaphore in array */
+ struct sem_queue *sem_pending; /* pending operations to be processed */
+ struct sem_queue **sem_pending_last; /* last pending operation */
+ struct sem_undo *undo; /* undo requests on this array */
+ unsigned short sem_nsems; /* no. of semaphores in array */
+};
+
+/* Include the definition of semid64_ds */
+#include <asm/sembuf.h>
+
+/* semop system calls takes an array of these. */
+struct sembuf {
+ unsigned short sem_num; /* semaphore index in array */
+ short sem_op; /* semaphore operation */
+ short sem_flg; /* operation flags */
+};
+
+/* arg for semctl system calls. */
+union semun {
+ int val; /* value for SETVAL */
+ struct semid_ds __user *buf; /* buffer for IPC_STAT & IPC_SET */
+ unsigned short __user *array; /* array for GETALL & SETALL */
+ struct seminfo __user *__buf; /* buffer for IPC_INFO */
+ void __user *__pad;
+};
+
+struct seminfo {
+ int semmap;
+ int semmni;
+ int semmns;
+ int semmnu;
+ int semmsl;
+ int semopm;
+ int semume;
+ int semusz;
+ int semvmx;
+ int semaem;
+};
+
+/*
+ * SEMMNI, SEMMSL and SEMMNS are default values which can be
+ * modified by sysctl.
+ * The values has been chosen to be larger than necessary for any
+ * known configuration.
+ *
+ * SEMOPM should not be increased beyond 1000, otherwise there is the
+ * risk that semop()/semtimedop() fails due to kernel memory fragmentation when
+ * allocating the sop array.
+ */
+
+
+#define SEMMNI 32000 /* <= IPCMNI max # of semaphore identifiers */
+#define SEMMSL 32000 /* <= INT_MAX max num of semaphores per id */
+#define SEMMNS (SEMMNI*SEMMSL) /* <= INT_MAX max # of semaphores in system */
+#define SEMOPM 500 /* <= 1 000 max num of ops per semop call */
+#define SEMVMX 32767 /* <= 32767 semaphore maximum value */
+#define SEMAEM SEMVMX /* adjust on exit max value */
+
+/* unused */
+#define SEMUME SEMOPM /* max num of undo entries per process */
+#define SEMMNU SEMMNS /* num of undo structures system wide */
+#define SEMMAP SEMMNS /* # of entries in semaphore map */
+#define SEMUSZ 20 /* sizeof struct sem_undo */
+
+
+#endif /* _UAPI_LINUX_SEM_H */