diff options
| -rw-r--r-- | linux/shmem.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/linux/shmem.c b/linux/shmem.c index 73b084ddb2..6cdf108c80 100644 --- a/linux/shmem.c +++ b/linux/shmem.c @@ -35,16 +35,21 @@ static int shmem_type=0; void* shmem_alloc(int size){ void* p; -int devzero; +static int devzero = -1; while(1){ switch(shmem_type){ case 0: // ========= MAP_ANON|MAP_SHARED ========== +#ifdef MAP_ANON p=mmap(0,size,PROT_READ|PROT_WRITE,MAP_ANON|MAP_SHARED,-1,0); if(p==MAP_FAILED) break; // failed // printf("shmem: %d bytes allocated using mmap anon (%X)\n",size,p); return p; +#else +// system does not support MAP_ANON at all (e.g. solaris 2.5.1/2.6), just fail + break; +#endif case 1: // ========= MAP_SHARED + /dev/zero ========== - if ((devzero = open("/dev/zero", O_RDWR, 0)) == -1) break; + if (devzero == -1 && (devzero = open("/dev/zero", O_RDWR, 0)) == -1) break; p=mmap(0,size,PROT_READ|PROT_WRITE,MAP_SHARED,devzero,0); if(p==MAP_FAILED) break; // failed // printf("shmem: %d bytes allocated using mmap /dev/zero (%X)\n",size,p); |