cpp-d1064d

[cross.git] / i686-linux-gnu-4.7 / usr / include / linux / sem.h

diff --git a/i686-linux-gnu-4.7/usr/include/linux/sem.h b/i686-linux-gnu-4.7/usr/include/linux/sem.h
new file mode 100644 (file)
index 0000000..f2f9b5f
--- /dev/null
+++ b/i686-linux-gnu-4.7/usr/include/linux/sem.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _LINUX_SEM_H
+#define _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
+#define SEM_STAT_ANY 20
+
+/* 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;              /* create/last semctl() 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 *buf;   /* buffer for IPC_STAT & IPC_SET */
+       unsigned short *array;  /* array for GETALL & SETALL */
+       struct seminfo *__buf;  /* buffer for IPC_INFO */
+       void *__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 /* _LINUX_SEM_H */