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- Log ----------------------------------------------------------------- commit ef13af84fb6e8649679b06585bec9dead71cfbe5 Author: Christophe Milard christophe.milard@linaro.org Date: Tue Nov 8 10:49:30 2016 +0100

doc: shm: defining behaviour when blocks have same name

Defining the reserve and lookup behaviour when multiple blocks are reserved using the same name.

Signed-off-by: Christophe Milard christophe.milard@linaro.org Reviewed-by: Bill Fischofer bill.fischofer@linaro.org Signed-off-by: Maxim Uvarov maxim.uvarov@linaro.org

diff --git a/doc/users-guide/users-guide.adoc b/doc/users-guide/users-guide.adoc index 078dd7c..9a427fa 100755 --- a/doc/users-guide/users-guide.adoc +++ b/doc/users-guide/users-guide.adoc @@ -594,7 +594,9 @@ resource. Blocks of shared memory can be created using the `odp_shm_reserve()` API call. The call expects a shared memory block name, a block size, an alignment requirement, and optional flags as parameters. It returns a `odp_shm_t` -handle. The size and alignment requirement are given in bytes. +handle. The size and alignment requirement are given in bytes. The provided +name does not have to be unique, i.e. a given name can be used multiple times, +when reserving different blocks.

.creating a block of shared memory [source,c] @@ -670,7 +672,9 @@ block is to use the `odp_shm_lookup()` API function call. This nevertheless requires the calling ODP thread to provide the name of the shared memory block: `odp_shm_lookup()` will return `ODP_SHM_INVALID` if no shared memory block -with the provided name is known by ODP. +with the provided name is known by ODP. When multiple blocks were reserved +using the same name, the lookup function will return the handle of any +of these blocks.

.retrieving a block handle and address from another ODP task [source,c]

commit bf4660cc53039e11f11c3bcf5f8c536a23844f52 Author: Christophe Milard christophe.milard@linaro.org Date: Tue Nov 8 10:49:29 2016 +0100

test: api: shm: test using the same block name multiple times

Make sure that many memory blocks can be created with the name.

Signed-off-by: Christophe Milard christophe.milard@linaro.org Reviewed-by: Bill Fischofer bill.fischofer@linaro.org Signed-off-by: Maxim Uvarov maxim.uvarov@linaro.org

diff --git a/test/common_plat/validation/api/shmem/shmem.c b/test/common_plat/validation/api/shmem/shmem.c index 6ea92d9..0e757a7 100644 --- a/test/common_plat/validation/api/shmem/shmem.c +++ b/test/common_plat/validation/api/shmem/shmem.c @@ -111,6 +111,7 @@ void shmem_test_basic(void) { pthrd_arg thrdarg; odp_shm_t shm; + odp_shm_t shm2; shared_test_data_t *shared_test_data; odp_cpumask_t unused;

@@ -120,7 +121,15 @@ void shmem_test_basic(void) CU_ASSERT(odp_shm_to_u64(shm) != odp_shm_to_u64(ODP_SHM_INVALID));

+ /* also check that another reserve with same name is accepted: */ + shm2 = odp_shm_reserve(MEM_NAME, + sizeof(shared_test_data_t), ALIGN_SIZE, 0); + CU_ASSERT(ODP_SHM_INVALID != shm2); + CU_ASSERT(odp_shm_to_u64(shm2) != + odp_shm_to_u64(ODP_SHM_INVALID)); + CU_ASSERT(0 == odp_shm_free(shm)); + CU_ASSERT(0 == odp_shm_free(shm2)); CU_ASSERT(ODP_SHM_INVALID == odp_shm_lookup(MEM_NAME));

shm = odp_shm_reserve(MEM_NAME,

commit beaf855847ba00fe180629b4fad1b93b59ca1f0f Author: Christophe Milard christophe.milard@linaro.org Date: Tue Nov 8 10:49:28 2016 +0100

linux-gen: _ishm: accept multiple usage of same block name

This is following the request that using the same name for multiple memory blocks should be allowed on north API. The change made here will affect any _ishm users (i.e. both north and south API), which is probably better for consistency.

Signed-off-by: Christophe Milard christophe.milard@linaro.org Reviewed-by: Bill Fischofer bill.fischofer@linaro.org Signed-off-by: Maxim Uvarov maxim.uvarov@linaro.org

diff --git a/platform/linux-generic/_ishm.c b/platform/linux-generic/_ishm.c index 7d9c213..449e357 100644 --- a/platform/linux-generic/_ishm.c +++ b/platform/linux-generic/_ishm.c @@ -777,14 +777,6 @@ int _odp_ishm_reserve(const char *name, uint64_t size, int fd, page_sz = odp_sys_page_size(); page_hp_size = odp_sys_huge_page_size();

- /* check if name already exists */ - if (name && (find_block_by_name(name) >= 0)) { - /* Found a block with the same name */ - odp_spinlock_unlock(&ishm_tbl->lock); - ODP_ERR("name "%s" already used.\n", name); - return -1; - } - /* grab a new entry: */ for (new_index = 0; new_index < ISHM_MAX_NB_BLOCKS; new_index++) { if (ishm_tbl->block[new_index].len == 0) {

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Summary of changes: doc/users-guide/users-guide.adoc | 8 ++++++-- platform/linux-generic/_ishm.c | 8 -------- test/common_plat/validation/api/shmem/shmem.c | 9 +++++++++ 3 files changed, 15 insertions(+), 10 deletions(-)

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