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[83.233.76.66]) by smtp.gmail.com with ESMTPSA id 92sm2102619lfu.6.2016.10.28.07.17.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 28 Oct 2016 07:17:13 -0700 (PDT) From: Christophe Milard To: petri.savolainen@nokia.com, mike.holmes@linaro.org, bill.fischofer@linaro.org, lng-odp@lists.linaro.org Date: Fri, 28 Oct 2016 17:16:18 +0200 Message-Id: <1477667786-19330-6-git-send-email-christophe.milard@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1477667786-19330-1-git-send-email-christophe.milard@linaro.org> References: <1477667786-19330-1-git-send-email-christophe.milard@linaro.org> X-Topics: patch Subject: [lng-odp] [API-NEXT PATCHv5 05/13] api: shm: add flags to shm_reserve and function to find external mem X-BeenThere: lng-odp@lists.linaro.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: "The OpenDataPlane \(ODP\) List" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lng-odp-bounces@lists.linaro.org Sender: "lng-odp" The ODP_SHM_SINGLE_VA flag is created: when set (at odp_shm_reserve()), this flag guarantees that all ODP threads sharing this memory block will see the block at the same address (regadless of ODP thread type -pthread vs process- or fork time) The flag ODP_SHM_EXPORT is added: when passed at odp_shm_reserve() time the memory block becomes visible to other ODP instances. The function odp_shm_find_exported() is added: this function enables to reserve block of memories exported by other ODP instances (using the ODP_SHM_EXPORT flag). Signed-off-by: Christophe Milard --- include/odp/api/spec/shared_memory.h | 41 +++++++++++++++++++++++++++++++----- 1 file changed, 36 insertions(+), 5 deletions(-) -- 2.7.4 diff --git a/include/odp/api/spec/shared_memory.h b/include/odp/api/spec/shared_memory.h index 8c76807..5b8d950 100644 --- a/include/odp/api/spec/shared_memory.h +++ b/include/odp/api/spec/shared_memory.h @@ -14,6 +14,7 @@ #ifndef ODP_API_SHARED_MEMORY_H_ #define ODP_API_SHARED_MEMORY_H_ #include +#include #ifdef __cplusplus extern "C" { @@ -43,12 +44,25 @@ extern "C" { #define ODP_SHM_NAME_LEN 32 /* - * Shared memory flags + * Shared memory flags: */ - -/* 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_SW_ONLY 0x1 /**< Application SW only, no HW access */ +#define ODP_SHM_PROC 0x2 /**< Share with external processes */ +/** + * Single virtual address + * + * When set, this flag guarantees that all ODP threads sharing this + * memory block will see the block at the same address - regardless + * of ODP thread type (e.g. pthread vs. process (or fork process time)). + */ +#define ODP_SHM_SINGLE_VA 0x4 +/** + * Export memory + * + * When set, the memory block becomes visible to other ODP instances + * through odp_shm_find_exported(). + */ +#define ODP_SHM_EXPORT 0x08 /** * Shared memory block info @@ -135,6 +149,23 @@ int odp_shm_free(odp_shm_t shm); */ odp_shm_t odp_shm_lookup(const char *name); +/** + * Get and reserve a block of shared memory, exported by another ODP instance + * + * @param remote_name Name of the block, in the remote ODP instance + * @param odp_inst Remote ODP instance, as returned by odp_init_global() + * @param local_name Name given to the block, in the local ODP instance + * (or NULL, if the application doesn't care) + * @param align Block alignment in bytes + * @param flags Shared memory parameter flags (ODP_SHM_*). + * Default value is 0. + * + * @return A new handle to the block if it is found (must be freed when done). + * @retval ODP_SHM_INVALID on failure + */ +odp_shm_t odp_shm_find_exported(const char *remote_name, + odp_instance_t odp_inst, + const char *local_name); /** * Shared memory block address