diff options
Diffstat (limited to 'src/kernel/ipc/shm.c')
| -rw-r--r-- | src/kernel/ipc/shm.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/kernel/ipc/shm.c b/src/kernel/ipc/shm.c index 0a0d3ee..1cdacfb 100644 --- a/src/kernel/ipc/shm.c +++ b/src/kernel/ipc/shm.c @@ -1,6 +1,7 @@ #include "shm.h" #include <mem/mem.h> #include <mem/seg.h> +#include <task/task.h> struct segment* shmseg_make(size_t len, struct process* owner) { struct shmseg *ss = kmalloc(sizeof(struct shmseg)); @@ -54,3 +55,28 @@ void shmseg_delete(struct segment *seg) { } kfree(ss->frames); } + +struct segment_map* shmseg_getByOff(struct process* pr, size_t offset) { + struct segment_map* m = pr->pagedir->mappedSegs; + while (m != 0) { + if (m->start == offset && m->seg->delete == shmseg_delete) return m; + m = m->next; + } + return 0; +} + +// **** **** SHM syscalls **** **** +int shm_create(size_t offset, size_t len) { + if (offset >= 0xE0000000) return -1; + if (len >= 0x10000000) return -1; + if (offset+len >= 0xE0000000) return -1; + seg_map(shmseg_make(len, current_thread->process), current_thread->process->pagedir, offset); + return 0; +} + +int shm_delete(size_t offset) { + struct segment_map *s = shmseg_getByOff(current_thread->process, offset); + if (s == 0) return -1; + seg_unmap(s); + return 0; +} |