Flag is needed to map process one shm block to process two.
Signed-off-by: Maxim Uvarov <maxim.uva...@linaro.org>
---
include/odp/api/shared_memory.h | 1 +
platform/linux-generic/odp_shared_memory.c | 9 +++++++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/include/odp/api/shared_memory.h b/include/odp/api/shared_memory.h
index 5d851ce..63b04d0 100644
--- a/include/odp/api/shared_memory.h
+++ b/include/odp/api/shared_memory.h
@@ -49,6 +49,7 @@ extern "C" {
/* Share level */
#define ODP_SHM_SW_ONLY 0x1 /**< Application SW only, no HW access */
#define ODP_SHM_PROC 0x2 /**< Share with external processes */
+#define ODP_SHM_PROC_NOCREAT 0x4
/**
* Shared memory block info
diff --git a/platform/linux-generic/odp_shared_memory.c
b/platform/linux-generic/odp_shared_memory.c
index ab48dda..549f497 100644
--- a/platform/linux-generic/odp_shared_memory.c
+++ b/platform/linux-generic/odp_shared_memory.c
@@ -189,7 +189,7 @@ odp_shm_t odp_shm_reserve(const char *name, uint64_t size,
uint64_t align,
int fd = -1;
int map_flag = MAP_SHARED;
/* If already exists: O_EXCL: error, O_TRUNC: truncate to zero */
- int oflag = O_RDWR | O_CREAT | O_TRUNC;
+ int oflag = O_RDWR;
uint64_t alloc_size;
uint64_t page_sz, huge_sz;
#ifdef MAP_HUGETLB
@@ -207,7 +207,12 @@ odp_shm_t odp_shm_reserve(const char *name, uint64_t size,
uint64_t align,
alloc_hp_size = (size + align + (huge_sz - 1)) & (-huge_sz);
#endif
- if (flags & ODP_SHM_PROC) {
+ if (flags & ODP_SHM_PROC)
+ oflag |= O_CREAT | O_TRUNC;
+
+ if (flags & (ODP_SHM_PROC | ODP_SHM_PROC_NOCREAT)) {
+ need_huge_page = 0;
+
/* Creates a file to /dev/shm */
fd = shm_open(name, oflag,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
--
1.9.1
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