sem.h

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#ifndef __VSF_LINUX_SYS_SEM_H__
#define __VSF_LINUX_SYS_SEM_H__
 
#include "shell/sys/linux/vsf_linux_cfg.h"
 
#if VSF_LINUX_CFG_RELATIVE_PATH == ENABLED
#   include "./types.h"
#   include "./ipc.h"
#else
#   include <sys/types.h>
#   include <sys/ipc.h>
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
// semop flags
#define SEM_UNDO            (1 << 0)
 
// semctl cmd
#define GETPID              (F_USER + 0)
#define GETVAL              (F_USER + 1)
#define GETALL              (F_USER + 2)
#define GETNCNT             (F_USER + 3)
#define GETZCNT             (F_USER + 4)
#define SETVAL              (F_USER + 5)
#define SETALL              (F_USER + 6)
 
struct semid_ds {
    struct ipc_perm         sem_perm;
};
 
struct sembuf {
    unsigned short          sem_num;
    short                   sem_op;
    short                   sem_flg;
};
 
#if VSF_LINUX_CFG_WRAPPER == ENABLED
#define semget              VSF_LINUX_WRAPPER(semget)
#define semctl              VSF_LINUX_WRAPPER(semctl)
#define semop               VSF_LINUX_WRAPPER(semop)
#define semtimedop          VSF_LINUX_WRAPPER(semtimedop)
#endif
 
#if VSF_LINUX_APPLET_USE_SYS_SEM == ENABLED
typedef struct vsf_linux_sys_sem_vplt_t {
    vsf_vplt_info_t info;
 
    VSF_APPLET_VPLT_ENTRY_FUNC_DEF(__semctl_va);
    VSF_APPLET_VPLT_ENTRY_FUNC_DEF(semctl);
    VSF_APPLET_VPLT_ENTRY_FUNC_DEF(semget);
    VSF_APPLET_VPLT_ENTRY_FUNC_DEF(semop);
    VSF_APPLET_VPLT_ENTRY_FUNC_DEF(semtimedop);
} vsf_linux_sys_sem_vplt_t;
#   ifndef __VSF_APPLET__
extern __VSF_VPLT_DECORATOR__ vsf_linux_sys_sem_vplt_t vsf_linux_sys_sem_vplt;
#   endif
#endif
 
#if     defined(__VSF_APPLET__) && (defined(__VSF_APPLET_LIB__) || defined(__VSF_APPLET_LINUX_SYS_SEM_LIB__))\
    &&  VSF_APPLET_CFG_ABI_PATCH != ENABLED && VSF_LINUX_APPLET_USE_SYS_SEM == ENABLED
 
#ifndef VSF_LINUX_APPLET_SYS_SEM_VPLT
#   if VSF_LINUX_USE_APPLET == ENABLED
#       define VSF_LINUX_APPLET_SYS_SEM_VPLT                                    \
            ((vsf_linux_sys_sem_vplt_t *)(VSF_LINUX_APPLET_VPLT->sys_sem_vplt))
#   else
#       define VSF_LINUX_APPLET_SYS_SEM_VPLT                                    \
            ((vsf_linux_sys_sem_vplt_t *)vsf_vplt((void *)0))
#   endif
#endif
 
#define VSF_LINUX_APPLET_SYS_SEM_ENTRY(__NAME)                                  \
            VSF_APPLET_VPLT_ENTRY_FUNC_ENTRY(VSF_LINUX_APPLET_SYS_SEM_VPLT, __NAME)
#define VSF_LINUX_APPLET_SYS_SEM_IMP(...)                                       \
            VSF_APPLET_VPLT_ENTRY_FUNC_IMP(VSF_LINUX_APPLET_SYS_SEM_VPLT, __VA_ARGS__)
 
VSF_LINUX_APPLET_SYS_SEM_IMP(__semctl_va, int, int semid, int semnum, int cmd, va_list ap) {
    VSF_APPLET_VPLT_ENTRY_FUNC_TRACE();
    return VSF_LINUX_APPLET_SYS_SEM_ENTRY(__semctl_va)(semid, semnum, cmd, ap);
}
VSF_LINUX_APPLET_SYS_SEM_IMP(semget, int, key_t key, int nsems, int semflg) {
    VSF_APPLET_VPLT_ENTRY_FUNC_TRACE();
    return VSF_LINUX_APPLET_SYS_SEM_ENTRY(semget)(key, nsems, semflg);
}
VSF_LINUX_APPLET_SYS_SEM_IMP(semop, int, int semid, struct sembuf *sops, size_t nsops) {
    VSF_APPLET_VPLT_ENTRY_FUNC_TRACE();
    return VSF_LINUX_APPLET_SYS_SEM_ENTRY(semop)(semid, sops, nsops);
}
VSF_LINUX_APPLET_SYS_SEM_IMP(semtimedop, int, int semid, struct sembuf *sops, size_t nsops, const struct timespec *timeout) {
    VSF_APPLET_VPLT_ENTRY_FUNC_TRACE();
    return VSF_LINUX_APPLET_SYS_SEM_ENTRY(semtimedop)(semid, sops, nsops, timeout);
}
 
VSF_APPLET_VPLT_FUNC_DECORATOR(semctl) int semctl(int semid, int semnum, int cmd, ...) {
    int result;
    va_list ap;
    va_start(ap, cmd);
        result = __semctl_va(semid, semnum, cmd, ap);
    va_end(ap);
    return result;
}
 
#else       // __VSF_APPLET__ && VSF_LINUX_APPLET_USE_SYS_SEM
 
int semctl(int semid, int semnum, int cmd, ...);
int semget(key_t key, int nsems, int semflg);
int semop(int semid, struct sembuf *sops, size_t nsops);
int semtimedop(int semid, struct sembuf *sops, size_t nsops,
                    const struct timespec *timeout);
 
#endif      // __VSF_APPLET__ && VSF_LINUX_APPLET_USE_SYS_SEM
 
#ifdef __cplusplus
}
#endif
 
#endif      // __VSF_LINUX_SEM_H__