77 lines
1.3 KiB
C++
77 lines
1.3 KiB
C++
#include <fcntl.h>
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#include <pthread.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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void* mmap(void* addr, size_t len, int prot, int flags, int fildes, off_t off)
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{
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sys_mmap_t args {
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.addr = addr,
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.len = len,
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.prot = prot,
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.flags = flags,
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.fildes = fildes,
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.off = off
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};
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long ret = syscall(SYS_MMAP, &args);
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if (ret == -1)
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return MAP_FAILED;
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return (void*)ret;
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}
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int munmap(void* addr, size_t len)
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{
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return syscall(SYS_MUNMAP, addr, len);
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}
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int mprotect(void* addr, size_t len, int prot)
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{
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return syscall(SYS_MPROTECT, addr, len, prot);
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}
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int msync(void* addr, size_t len, int flags)
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{
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pthread_testcancel();
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return syscall(SYS_MSYNC, addr, len, flags);
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}
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int posix_madvise(void* addr, size_t len, int advice)
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{
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(void)addr;
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(void)len;
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(void)advice;
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return 0;
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}
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int mlock(const void* addr, size_t len)
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{
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(void)addr;
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(void)len;
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return 0;
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}
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int munlock(const void* addr, size_t len)
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{
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(void)addr;
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(void)len;
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return 0;
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}
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int shm_open(const char* name, int oflag, mode_t mode)
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{
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if (mkdir("/tmp/shm", 0777) == -1 && errno != EEXIST)
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return -1;
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char path[PATH_MAX];
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sprintf(path, "/tmp/shm%s", name);
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return open(path, oflag | O_CLOEXEC, mode);
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}
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int shm_unlink(const char* name)
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{
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char path[PATH_MAX];
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sprintf(path, "/tmp/shm%s", name);
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return unlink(path);
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}
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