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| CAPI | |
|---|---|
| Name | CAPI |
| Full name | Common Application Programming Interface |
| Type | Application programming interface |
| Introduced | 1980s–2000s |
| Developer | Multiple vendors and standards bodies |
| Status | Active |
CAPI CAPI is a computing interface concept that standardizes interaction between software components and hardware or middleware. It has been implemented in diverse contexts by vendors and standards organizations to enable interoperability among systems developed by IBM, Intel Corporation, Microsoft, Oracle Corporation, Sun Microsystems, Red Hat, SAP SE, Cisco Systems, and Hewlett-Packard Enterprise. Implementations influenced projects and platforms such as Linux, Windows NT, UNIX System V, FreeBSD, OpenBSD, NetBSD, AIX, HP-UX, and macOS.
CAPI denotes an interface specification allowing applications to invoke services provided by libraries, kernels, firmware, or specialized processors from firms like NVIDIA, AMD, Broadcom, Xilinx, Altera, Microchip Technology, Texas Instruments, Qualcomm, and ARM Holdings. It articulates function signatures, data structures, error codes, and calling conventions used across ecosystems including POSIX, W3C, IETF, IEEE, ISO, and ECMA International. Similar efforts can be seen in interfaces defined by Oracle Corporation for Java Platform, by Microsoft for .NET Framework, and by Apple Inc. for Cocoa.
Early inspirations trace to vendor-specific APIs from IBM mainframes and DEC minicomputers, with later acceleration from open-source movements around Richard Stallman and projects like GNU Project. Standardization matured through contributions from corporations such as Sun Microsystems during the rise of Java, and from consortia like The Open Group with UNIX. Academic influence came from institutions including MIT, Stanford University, Carnegie Mellon University, University of California, Berkeley, and Massachusetts Institute of Technology. Key milestones paralleled the release of POSIX standards, the emergence of CORBA, the adoption of SOAP and RESTful patterns led by organizations such as W3C and IETF.
Architectures implementing CAPI-style interfaces span user-space libraries, kernel modules, remote procedure call systems, and accelerator offload paths found in products from NVIDIA and Xilinx. Patterns include monolithic bindings used in Microsoft Windows APIs, microkernel-oriented interfaces seen in Minix and QNX, and virtualization-aware APIs from VMware and KVM. Networked variants use protocols championed by IETF and implemented in stacks by Cisco Systems, Juniper Networks, and Arista Networks. Interlanguage bindings exist for C++, Java, Python, Ruby, Perl, Go, and Rust.
CAPI-style interfaces enable enterprise applications in suites by SAP SE, Oracle Corporation, and Microsoft Dynamics, scientific computing on clusters built with components from Cray Inc., Hewlett-Packard Enterprise, and Dell Technologies, and graphics and vision pipelines using NVIDIA GPUs and AMD GPUs. Telecom stacks from Ericsson, Nokia, and Huawei adopt such interfaces for radio and packet processing, while financial systems at firms like Goldman Sachs, JPMorgan Chase, and Morgan Stanley integrate low-latency bindings. Cloud platforms such as Amazon Web Services, Microsoft Azure, and Google Cloud Platform expose API surfaces for orchestration, and container ecosystems like Docker and Kubernetes rely on standardized plugin interfaces.
Advantages include interoperability across ecosystems involving Linux, Windows Server, and macOS Server; performance optimizations leveraging accelerators by NVIDIA and Intel; and vendor neutrality promoted by The Open Group and IEEE. Limitations arise from vendor lock-in risks associated with proprietary extensions by Microsoft and Oracle Corporation; fragmentation exemplified by competing models from Sun Microsystems and IBM; and portability challenges between platforms such as AIX, HP-UX, and mainstream UNIX-like systems. Legal and licensing considerations involve entities like Free Software Foundation and Open Source Initiative.
Implementations follow guidelines from standards bodies like ISO, IEC, IETF, W3C, and IEEE Standards Association, and are distributed in toolchains by GCC, Clang/LLVM, Microsoft Visual Studio, and Intel Parallel Studio. Middleware vendors including Red Hat, IBM, Oracle Corporation, and VMware ship libraries and bindings. Packaging and distribution integrate with ecosystems like Debian, Ubuntu, Fedora, CentOS, openSUSE, and Homebrew.
Security considerations involve threat models relevant to products and projects such as OpenSSL, GnuTLS, SELinux, AppArmor, and iptables—requiring authentication, authorization, input validation, and sandboxing as practiced in Google Chrome, Mozilla Firefox, and Microsoft Edge. Privacy compliance intersects with regulations and frameworks like GDPR, HIPAA, and PCI DSS, and is audited using standards from ISO/IEC 27001 and assessment bodies including OWASP and NIST. Implementation hardening employs technologies from Intel (e.g., Intel SGX) and AMD (e.g., AMD SEV).
Category:Application programming interfaces